en-US Physics Forums RSS Feed This is the official global feed for PhysicsForums.com Mon, 19 Oct 2026 07:57:35 +0000 Mon, 19 Oct 2026 07:57:35 +0000 Physics Forums - Science by Humans https://www.physicsforums.com/ One hundred people line up to board an airplane Mon, 19 Oct 2026 07:01:33 +0000 https://www.physicsforums.com/threads/one-hundred-people-line-up-to-board-an-airplane.1086202/ urn:xenforo:thread:1086202 invalid@example.com (Gavran) Gavran [P. Winkler] One hundred people line up to board an airplane. Each has a boarding pass with an assigned seat. However, the first person to board has lost his boarding pass and takes a random seat. After that, each person takes the assigned seat if it is unoccupied, and one of the unoccupied...

Read more]]> 21 Space Stuff and Launch Info Mon, 19 Oct 2026 06:55:28 +0000 https://www.physicsforums.com/threads/space-stuff-and-launch-info.879196/ urn:xenforo:thread:879196 invalid@example.com (1oldman2) 1oldman2 Due to the constant never ending supply of "cool stuff" happening in Aerospace these days I'm creating this thread to consolidate posts every time something new comes along. Please feel free to add random information if its relevant. So to start things off here is the SpaceX Dragon launch coming...

Read more]]> 1729 Nobel Prize in Chemistry 2026, Mon, 19 Oct 2026 06:54:44 +0000 https://www.physicsforums.com/threads/nobel-prize-in-chemistry-2026.1086422/ urn:xenforo:thread:1086422 invalid@example.com (Astronuc) Astronuc Henri B. Kagan, Université Paris-Sud, France
Kenso Soai, Tokyo University of Science, Japan

“for the discovery of non-linear effects and autocatalysis in asymmetric organic synthesis”

They made chemistry choose a mirror image...​


Read more]]> 9 Skolem's Paradox (First Order Logic) Mon, 19 Oct 2026 05:01:57 +0000 https://www.physicsforums.com/threads/skolems-paradox-first-order-logic.1086503/ urn:xenforo:thread:1086503 invalid@example.com (Matterwave) Matterwave I'm reading Leary and Kristiansen "Mathematical Logic".

This is problem 8 in section 3.4.1. exercise 8. It's not homework since I don't have homework anymore. But it was an interesting problem to think through. Not sure if I got it right though.

I'm paraphrasing the book since I don't want to...

Read more]]> 17 Introductory Physics Homework Help Mon, 19 Oct 2026 04:53:10 +0000 https://www.physicsforums.com/threads/introductory-physics-homework-help.1086514/ urn:xenforo:thread:1086514 invalid@example.com (juko88) juko88 Title: Need Help with Introductory Physics Homework

Hello everyone,

I am currently studying introductory physics and need some help understanding a few concepts and solving homework problems.

I would appreciate it if someone could explain the solutions step by step...

Read more]]> 0 About E learning and Earning Mon, 19 Oct 2026 04:46:41 +0000 https://www.physicsforums.com/threads/about-e-learning-and-earning.1086511/ urn:xenforo:thread:1086511 invalid@example.com (mostofa9066) mostofa9066 I would like to open a discussion on the concept of E-Learning and Earning, specifically focusing on how acquiring IT and technical skills online enables self-employment and remote working opportunities.

Key aspects I'd like to discuss:

  • Skill Acquisition:...

Read more]]> 0 Random Photos Mon, 19 Oct 2026 03:28:17 +0000 https://www.physicsforums.com/threads/random-photos.994801/ urn:xenforo:thread:994801 invalid@example.com (Point Conception) Point Conception A topic for random photos: Ko-Larn island 7 km West of PattayaIMG_20200717_114141.jpg]]> 3972 The major 7th chord Mon, 19 Oct 2026 02:40:33 +0000 https://www.physicsforums.com/threads/the-major-7th-chord.1086509/ urn:xenforo:thread:1086509 invalid@example.com (Bob Walance) Bob Walance The major 7th chord can be very interesting. Musicians including Pink Floyd, Burt Bacharach, and The Carpenters have used it frequently in their tunes.

Simple chords are part of nature. Any instrument, including the human voice, creates a major chord with its harmonics (overtones).

After doing...

Read more]]> 2 Any Advice On My College Major and Path? Mon, 19 Oct 2026 02:29:13 +0000 https://www.physicsforums.com/threads/any-advice-on-my-college-major-and-path.1086490/ urn:xenforo:thread:1086490 invalid@example.com (zionri2) zionri2 I need some advice on my major. I attend an early college high school where I will graduate with my associates degree and I want to go into either physics or aerospace engineering and I’m leaning more towards physics but everyone is telling me to do aerospace because of the job market but I...

Read more]]> 13 Collection of Lame Jokes Mon, 19 Oct 2026 01:39:56 +0000 https://www.physicsforums.com/threads/collection-of-lame-jokes.25301/ urn:xenforo:thread:25301 invalid@example.com (quddusaliquddus) quddusaliquddus Lamest joke you know ... :zzz:]]> 24370 Could we communicate with extraterrestrial life in a reasonable timeframe? Mon, 19 Oct 2026 01:16:55 +0000 https://www.physicsforums.com/threads/could-we-communicate-with-extraterrestrial-life-in-a-reasonable-timeframe.1085624/ urn:xenforo:thread:1085624 invalid@example.com (Frimus) Frimus
Frimus said:
I see the problem discussed here from a different angle. Instead of asking why the others are not here when we are here, I would ask: Why are we here when the others are not here? Could it be that advanced civilizations in Universe don't last long enough to leave visible traces?
This...

Read more]]> 5 Today I Learned Mon, 19 Oct 2026 01:09:17 +0000 https://www.physicsforums.com/threads/today-i-learned.783257/ urn:xenforo:thread:783257 invalid@example.com (Greg Bernhardt) Greg Bernhardt Every day we learn new things. Sometimes it's just a small fact or realization. No matter how trivial or random, let's start recording our daily lessons.

Please start off with "Today I learned". Keep commentary to a minimum and just LIKE posts. I'll start!

Today I learned that you clean...

Read more]]> 7000 Wooly Bully Sun, 18 Oct 2026 21:51:56 +0000 https://www.physicsforums.com/threads/wooly-bully.1084313/ urn:xenforo:thread:1084313 invalid@example.com (symbolipoint) symbolipoint Domingo Samudio (Sam The Sham) who created a wellknown novelty song was persuaded to rename the song he first wanted to call it "Hully Gully". So he used the name of his cat, "Wooly Bully".]]> 4 Spatial separation of entangled particles implies physical separability? Sun, 18 Oct 2026 21:07:28 +0000 https://www.physicsforums.com/threads/spatial-separation-of-entangled-particles-implies-physical-separability.1086097/ urn:xenforo:thread:1086097 invalid@example.com (aletheia) aletheia In experiments with entangled systems, the two subsystems can clearly become spatially separated and operationally distinguishable: they propagate to different locations, can be addressed by different apparatuses, and eventually produce separate local detection records.

For example, Hensen...

Read more]]> 41 Hello, new member :) Sun, 18 Oct 2026 21:01:34 +0000 https://www.physicsforums.com/threads/hello-new-member.1086510/ urn:xenforo:thread:1086510 invalid@example.com (IsaacTheIntegral) IsaacTheIntegral High schooler, passionate about physics and calculus (multivariable and otherwise). I want to pass the F=ma exam by the end of high school. I want to major in theoretical physics.

For anyone who's reading this, have a great rest of your day!

- IsaacTheIntegral]]> 1 How many interpretations of QM do you speak? Sun, 18 Oct 2026 20:27:40 +0000 https://www.physicsforums.com/threads/how-many-interpretations-of-qm-do-you-speak.1086324/ urn:xenforo:thread:1086324 invalid@example.com (Demystifier) Demystifier For me, different interpretations of QM are like different languages, namely, different ways to speak about the same quantum formalism and phenomena. When someone speaks about QM in terms of one interpretation, usually there is a way to translate it to another interpretation. The more...

Read more]]> 188 How to make a theoretical model of a Blackburn pendulum more realistic Sun, 18 Oct 2026 18:16:42 +0000 https://www.physicsforums.com/threads/how-to-make-a-theoretical-model-of-a-blackburn-pendulum-more-realistic.1086504/ urn:xenforo:thread:1086504 invalid@example.com (Anthony1) Anthony1 I am modeling a Blackburn pendulum where the bob is much heavier than the string, so I treat the string as massless and inextensible.

I would like to make my model and experiment more realistic. Could you help me with the following questions?

1. How do I formally incorporate linear...

Read more]]> 2 Interesting math problem that I saw online Sun, 18 Oct 2026 18:09:46 +0000 https://www.physicsforums.com/threads/interesting-math-problem-that-i-saw-online.1086394/ urn:xenforo:thread:1086394 invalid@example.com (Charles Link) Charles Link Problem is contained in the summary above.]]> 45 Why does Moment of Inertia have an R^2 dependence (logically)? Sun, 18 Oct 2026 16:42:48 +0000 https://www.physicsforums.com/threads/why-does-moment-of-inertia-have-an-r-2-dependence-logically.1086501/ urn:xenforo:thread:1086501 invalid@example.com (Yug Ahuja) Yug Ahuja I am trying to understand the physical and intuitive origin of the ##𝑟^2## factor in the moment of inertia (𝐼=𝑚𝑟2) from first principles, but I keep running into circular or unsatisfactory definitions in standard textbooks.

Usually, the [𝑟2] factor is justified using one of two methods:

  1. ...

Read more]]> 10 Wordle Lovers - Play the NYT Daily Game Sun, 18 Oct 2026 16:18:55 +0000 https://www.physicsforums.com/threads/wordle-lovers-play-the-nyt-daily-game.1016903/ urn:xenforo:thread:1016903 invalid@example.com (fresh_42) fresh_42 This thread is for all who like the daily Wordle game of the New York Times as much as I do.

The rules:

1) https://www.nytimes.com/games/wordle/index.html
2) Post your result.
3) Do not spoil the answer.]]> 8814 A Tesla for the Dukes of Hazard Sun, 18 Oct 2026 15:55:01 +0000 https://www.physicsforums.com/threads/a-tesla-for-the-dukes-of-hazard.1086506/ urn:xenforo:thread:1086506 invalid@example.com (gleem) gleem Musk finally debuted his Roadster that he has been promising for several years with an added feature.

]]> 1 Career guidance for a very lost Physics PhD student? Sun, 18 Oct 2026 15:18:42 +0000 https://www.physicsforums.com/threads/career-guidance-for-a-very-lost-physics-phd-student.1086245/ urn:xenforo:thread:1086245 invalid@example.com (dp647) dp647 I feel quite lost with regard to forming any sort of career plan at the moment. Right now, I’m at the start of my 4th year as a Physics PhD student at a good school (one of the Ivies). My work so far has been in theoretical condensed matter physics (cold atom gases in optical cavities).

I think...

Read more]]> 58 Cover songs versus the original track, which ones are better? Sun, 18 Oct 2026 14:18:52 +0000 https://www.physicsforums.com/threads/cover-songs-versus-the-original-track-which-ones-are-better.1050205/ urn:xenforo:thread:1050205 invalid@example.com (pinball1970) pinball1970 Which songs were performed, arranged or produced better in a cover than the original version?
Which songs should have been left well alone?

Also, I think restricting the covers just to released singles will restrict some interesting stonkers and stinkers so album tracks are allowed.]]> 2644 Momentum vs inertia Sun, 18 Oct 2026 12:18:12 +0000 https://www.physicsforums.com/threads/momentum-vs-inertia.1086185/ urn:xenforo:thread:1086185 invalid@example.com (Galaxion) Galaxion Can momentum considered as the resistance of a force? Why?I noticed that the physical meaning of momentum and inertia are similar]]> 13 Solderless SMA screw mounting RF issues Sun, 18 Oct 2026 10:13:18 +0000 https://www.physicsforums.com/threads/solderless-sma-screw-mounting-rf-issues.1086429/ urn:xenforo:thread:1086429 invalid@example.com (yefj) yefj Hello,I have a PNA which works till 120GHz I use a 1mm to 1.85mm adapter to measure till 67GHz 1.85 SMA.

I need to measure a differential lines.
At first i got low causality about 50% so i played with the connector screwed unscrewed tried wipe of some spots i saw on the ground pad.
Then i saw...

Read more]]> 13 Knots In 4D Sun, 18 Oct 2026 06:20:43 +0000 https://www.physicsforums.com/threads/knots-in-4d.1085020/ urn:xenforo:thread:1085020 invalid@example.com (Hornbein) Hornbein One may often read that mathematical knots (closed curves) can't exist in a 4D Euclidean space. More precisely, they would all "fall apart" and be equivalent to the circle. I say that 2D manifolds in 4D can be knots. Except for the simple 2-sphere I couldn't imagine what such a knot would be...

Read more]]> 6 Harvard Goes Psychedelic Sun, 18 Oct 2026 06:17:01 +0000 https://www.physicsforums.com/threads/harvard-goes-psychedelic.1086241/ urn:xenforo:thread:1086241 invalid@example.com (Hornbein) Hornbein https://mahindrahumanities.harvard....elic-literature-conversation-elastic-magazine

Harvard's Psychedelics in Society and Culture program supports Elastic magazine. This issue circles the porousness of the self, ecological entanglements, and how strange and...

Read more]]> 17 Getting to the Heart of Entanglement and Locality in Plain English Sun, 18 Oct 2026 00:05:06 +0000 https://www.physicsforums.com/threads/getting-to-the-heart-of-entanglement-and-locality-in-plain-english.1086460/ urn:xenforo:thread:1086460 invalid@example.com (jeffn1) jeffn1 I understand two particles can be entangled even though they are many millions of miles away.

I understand a simple example of this is a "quantum singlet state":

Singlet State: This is the precise quantum state where two entangled particles have a total spin of zero. Because the...

Read more]]> 32 Things that are getting tiresome to see in scifi (whichever medium) Sat, 17 Oct 2026 22:36:19 +0000 https://www.physicsforums.com/threads/things-that-are-getting-tiresome-to-see-in-scifi-whichever-medium.1086479/ urn:xenforo:thread:1086479 invalid@example.com (sbrothy) sbrothy "Something located in the constellation X."

You people have any pet peeves in this genre?]]> 24 Theoretical question on extra dimensions Sat, 17 Oct 2026 14:01:12 +0000 https://www.physicsforums.com/threads/theoretical-question-on-extra-dimensions.1086439/ urn:xenforo:thread:1086439 invalid@example.com (satoshi) satoshi Hi everyone,

I’ve been spending a lot of time lately diving into higher-dimensional physics and quantum information theory, and I wanted to get your thoughts on a specific conceptual intersection.

According to string theory (and M-theory), the universe requires 10 or 11 dimensions to remain...

Read more]]> 6 Movement between two blocks Sat, 17 Oct 2026 10:17:09 +0000 https://www.physicsforums.com/threads/movement-between-two-blocks.1086464/ urn:xenforo:thread:1086464 invalid@example.com (CassLovesKinematics) CassLovesKinematics Ok so first I drew the blocks on top of each other and found both normal forces. The normal force acting on block A (Na) is 34.335 N, and the normal force acting on block B (Nb) is 73.575 N. Because P is acting on A, you can find the friction force by multiplying the friction coefficient (0.4)...

Read more]]> 6 How does the Riemann Hypothesis/Riemann Zeta function even work? Sat, 17 Oct 2026 00:35:04 +0000 https://www.physicsforums.com/threads/how-does-the-riemann-hypothesis-riemann-zeta-function-even-work.1081243/ urn:xenforo:thread:1081243 invalid@example.com (Beyond3D) Beyond3D I understand that $$\zeta(s)=\sum_{n=1}^{\infty}\frac{1}{n^s}=\frac{1}{1^s}+\frac{1}{2^s}+\frac{1}{3^s}\cdots$$
I understand what an infinite series is. I know n goes on to infinity and that s is the function input. I just don't know how the heck this finds primes? Can someone explain? I have...

Read more]]> 21 Where Do Simplified Models Stop Being Useful in Physics? Fri, 16 Oct 2026 20:11:38 +0000 https://www.physicsforums.com/threads/where-do-simplified-models-stop-being-useful-in-physics.1086497/ urn:xenforo:thread:1086497 invalid@example.com (cedricuk) cedricuk Physics often uses simplified models to explain real-world behaviour. These models can make complicated systems easier to understand, but they also rely on assumptions that may not hold in every situation.

For example, frictionless surfaces, point masses and ideal gases are useful starting...

Read more]]> 3 The Planck scale, black hole interiors, observable universe and GR Fri, 16 Oct 2026 14:44:29 +0000 https://www.physicsforums.com/threads/the-planck-scale-black-hole-interiors-observable-universe-and-gr.1086474/ urn:xenforo:thread:1086474 invalid@example.com (darkdark10) darkdark10 1.Modern gravitational physics has fundamental problems, including

1)the Planck-scale divergence problem,
2)the black hole singularity problem,
3)the inflation problem, and
4)the dark energy problem.

The continuous appearance of these anomalous phenomena suggests that an important...

Read more]]> 7 hello everyone Fri, 16 Oct 2026 14:00:59 +0000 https://www.physicsforums.com/threads/hello-everyone.1086499/ urn:xenforo:thread:1086499 invalid@example.com (Yug Ahuja) Yug Ahuja I am Yug Ahuja, an undergrad from india preparing for entrance exam to get into college. I love physics, mathematics, computer science.]]> 1 Doing more work walking from the pole to the equator Fri, 16 Oct 2026 13:49:27 +0000 https://www.physicsforums.com/threads/doing-more-work-walking-from-the-pole-to-the-equator.1086446/ urn:xenforo:thread:1086446 invalid@example.com (peanutaxis) peanutaxis Something occurred to me the other day. If you [could] walk from a pole to the equator, not only would you have to do more work because the equator is probably at a higher elevation but you also have to do the work to get your mass to spin with the equator - 1600 odd km/h.]]> 26 New member :) Fri, 16 Oct 2026 13:09:08 +0000 https://www.physicsforums.com/threads/new-member.1086492/ urn:xenforo:thread:1086492 invalid@example.com (J3nnif3r) J3nnif3r i still dont know how,]]> 2 Potential wrong crosstalk measurement result with faulty vna cable Fri, 16 Oct 2026 12:36:42 +0000 https://www.physicsforums.com/threads/potential-wrong-crosstalk-measurement-result-with-faulty-vna-cable.1086498/ urn:xenforo:thread:1086498 invalid@example.com (yefj) yefj Hello , I have a PCB when I am doing NEXT tests of victim agressor on two differential lines.
The opposite end of the lines is terminated.

I am measuring sdd21 values around -40dB.
Very often I have problem with the cables.
suppose I have S11 S22 S33 S44 at -10dB which is good can I be...

Read more]]> 0 How Do You Measure Energy Conversion Efficiency? Fri, 16 Oct 2026 10:32:25 +0000 https://www.physicsforums.com/threads/how-do-you-measure-energy-conversion-efficiency.1086484/ urn:xenforo:thread:1086484 invalid@example.com (cedricuk) cedricuk Energy conversion looks straightforward in theory, but measuring efficiency in real systems can be challenging.

How do you account for energy converted into heat or other forms that are difficult to measure? Which instruments or experimental methods give the most reliable results?

I'd be...

Read more]]> 6 Trigonometry puzzle Fri, 16 Oct 2026 02:52:47 +0000 https://www.physicsforums.com/threads/trigonometry-puzzle.1086493/ urn:xenforo:thread:1086493 invalid@example.com (WWGD) WWGD Ok, not originally mine:
A message was encrypted as:
$$\frac{sinq}{cosq}\times{\sqrt(\frac{-1}{64})}$$
What is the meaning of it? @berkeman , thanks for the edit.]]> 6 Kitten Lovers: Cuteness Overload Fri, 16 Oct 2026 00:27:50 +0000 https://www.physicsforums.com/threads/kitten-lovers-cuteness-overload.130472/ urn:xenforo:thread:130472 invalid@example.com (Evo) Evo This was just so damned cute, it deserved it's own thread.

Whenever I see cute kittens I can't help thinking of MIH, Tsu, Ivan, and Integral, and now Moonbear.

Moonbear, how's the kitty doing? We need an update!

This is quite the socially adept kitten, covering a yawn.

yawnmf9.jpg]]> 3887 Prof. Verschure's thin section collection from the Fen and Hor localities Thu, 15 Oct 2026 23:17:06 +0000 https://www.physicsforums.com/threads/prof-verschures-thin-section-collection-from-the-fen-and-hor-localities.1054432/ urn:xenforo:thread:1054432 invalid@example.com (Andy Resnick) Andy Resnick (Edit: since the thread title was changed, this first sentence is too cryptic: the original title referred to a Tool song....)

Besides being a favorite song by a favorite band, the thread title is a straightforward play on words. This summer, as a present to myself for being promoted, I...

Read more]]> 181 Tensors, tensor products Thu, 15 Oct 2026 22:38:16 +0000 https://www.physicsforums.com/threads/tensors-tensor-products.1086487/ urn:xenforo:thread:1086487 invalid@example.com (wrobel) wrobel Just found a really good lecture on tensors. It starts with the absolute basics and goes all the way up to universal mapping:



I just want to recall the standard realization of the tensor product.

Let ##X, Y## be vector spaces, say over ##\mathbb{R}##. These spaces need...

Read more]]> 5 Recycling In Bali Thu, 15 Oct 2026 22:33:15 +0000 https://www.physicsforums.com/threads/recycling-in-bali.1086491/ urn:xenforo:thread:1086491 invalid@example.com (Hornbein) Hornbein Transporting a huge sack of empty water bottles on a motorbike.

]]> 0 Is bioelectricity considered more physics or biology? Thu, 15 Oct 2026 19:43:04 +0000 https://www.physicsforums.com/threads/is-bioelectricity-considered-more-physics-or-biology.1085442/ urn:xenforo:thread:1085442 invalid@example.com (BeablossomR_) BeablossomR_ Hi everyone,

I’ve been trying to understand bioelectricity, especially how neurons transmit signals, and I’m not sure whether it’s better approached from a physics or biology perspective.

From a physics point of view, I’ve seen it compared to basic electrical systems, while biologically it...

Read more]]> 4 Vibe Coding with AI - a success story Thu, 15 Oct 2026 19:39:31 +0000 https://www.physicsforums.com/threads/vibe-coding-with-ai-a-success-story.1086480/ urn:xenforo:thread:1086480 invalid@example.com (DaveC426913) DaveC426913 I'm old and I want to get stuff done. I have other hobbies than programming web applcations.

I just vibe-coded a complete GUI control panel for my dad's painting gallery. Didn't write a single line of code.

Backstory:
I built the gallery a year or so ago by-hand, to...

Read more]]> 7 How Does an LED Diffuser Affect Light Transmission? Thu, 15 Oct 2026 14:29:19 +0000 https://www.physicsforums.com/threads/how-does-an-led-diffuser-affect-light-transmission.1086468/ urn:xenforo:thread:1086468 invalid@example.com (cedricuk) cedricuk I’m interested in the physics of light scattering in frosted plastic. Does a diffuser mainly redirect light, or does it also reduce the total light transmitted? How would its transmission be measured experimentally?]]> 3 Race car suspension Class Thu, 15 Oct 2026 13:54:17 +0000 https://www.physicsforums.com/threads/race-car-suspension-class.326355/ urn:xenforo:thread:326355 invalid@example.com (Ranger Mike) Ranger Mike Posted June 2024 - 15 years after starting this class. I have learned a whole lot. To get to the short course on making your stock car, late model, hobby stock E-mod handle, look at the index below. Read all posts on Roll Center, Jacking effect and Why does car drive straight to the wall when I...

Read more]]> 1804 Arduino-based Raman spectrometer for drug identification Thu, 15 Oct 2026 13:06:31 +0000 https://www.physicsforums.com/threads/arduino-based-raman-spectrometer-for-drug-identification.1082247/ urn:xenforo:thread:1082247 invalid@example.com (sbrothy) sbrothy Some time ago I posted this Raspberry PI DIY Mass Spec using Raman Scattering. It's was something of a cumbersome project though, needing a 3D printer and special heat-resistant plastic giving of carcinogenic fumes during printing. To be blunt it was also not very mobile and interpreting...

Read more]]> 68 Exoplanet, HD 137010 b and it's star, HD 137010 Thu, 15 Oct 2026 12:42:31 +0000 https://www.physicsforums.com/threads/exoplanet-hd-137010-b-and-its-star-hd-137010.1084179/ urn:xenforo:thread:1084179 invalid@example.com (Astronuc) Astronuc An article appeared recently about an earth-like planet, HD 137010 b, which is around an orange start, HD 137010. Of course, I wanted more information

HD 137010 b is an unconfirmed exoplanet detected around star HD 137010. More observations are needed to confirm its existence...

Read more]]> 11 Two masses collide elastically... Thu, 15 Oct 2026 12:24:00 +0000 https://www.physicsforums.com/threads/two-masses-collide-elastically.1086477/ urn:xenforo:thread:1086477 invalid@example.com (GIASAL) GIASAL A body of mass m1 = 2 kg with a velocity v1 = 12 m/s collides elastically with a second body initially at rest. The first body continues to move in the same direction as the initial one but with a velocity equal to one-quarter of its initial velocity. Find the mass of the second body in kg.

Thanks]]> 7 The Bali Gasoline Panic Thu, 15 Oct 2026 12:10:54 +0000 https://www.physicsforums.com/threads/the-bali-gasoline-panic.1086475/ urn:xenforo:thread:1086475 invalid@example.com (Hornbein) Hornbein A tanker delivering fuel to Bali fouled its anchor, blocking offloading for 15 hours. Bali has a second such offloading port but it is further from the gas stations so there were delays in getting the fuel distributed. Some stations ran out. The news spread quickly. Fossil fuel consumers...

Read more]]> 2 Heat radiation in vacuum Thu, 15 Oct 2026 10:53:50 +0000 https://www.physicsforums.com/threads/heat-radiation-in-vacuum.1085787/ urn:xenforo:thread:1085787 invalid@example.com (ravindrar) ravindrar Suppose I have a vacuum chamber made entirely of stainless steel and it is completely enclosed on all sides. Inside the chamber, fruit slices are placed on a tray for vacuum drying.

Assume the chamber is not externally heated. Instead, its outer surface is exposed only to ambient air at about...

Read more]]> 39 SpaceX starts operational Starship launches Thu, 15 Oct 2026 06:33:42 +0000 https://www.physicsforums.com/threads/spacex-starts-operational-starship-launches.1086220/ urn:xenforo:thread:1086220 invalid@example.com (mfb) mfb Based on air traffic coordination
Edit: Also as FAA advisory now

SpaceX should release a flight plan soon but we can expect a ~250-350 km circular orbit with a booster splashdown near the launch site. It will then deploy Starlink v3 satellites which were made specifically for...

Read more]]> 18 Water chiller using vacuum Thu, 15 Oct 2026 01:23:56 +0000 https://www.physicsforums.com/threads/water-chiller-using-vacuum.1086365/ urn:xenforo:thread:1086365 invalid@example.com (vacuum_theory) vacuum_theory With the goal of using off the shelf items to make something similar to Viktor Schauberger's water vortex structuring machine, will this setup work?
The setup is an inverted 5 gallon vacuum chamber half submerged in water with vacuum applied while running a Lilly impeller pump in a bowl below...

Read more]]> 11 Renewable Energy Sources are Making Gains Thu, 15 Oct 2026 00:04:48 +0000 https://www.physicsforums.com/threads/renewable-energy-sources-are-making-gains.1085847/ urn:xenforo:thread:1085847 invalid@example.com (BillTre) BillTre Screenshot 2026-07-22 at 9.51.13 AM.webp

Screenshot 2026-07-22 at 9.56.42 AM.webp

Screenshot 2026-07-23 at 7.07.14 PM.webp

Screenshot 2026-07-24 at 8.07.36 AM.webp

Screenshot 2026-07-25 at 9.15.18 AM.webp]]> 33 Favorite songs (cont.) Thu, 15 Oct 2026 00:04:25 +0000 https://www.physicsforums.com/threads/favorite-songs-cont.1064857/ urn:xenforo:thread:1064857 invalid@example.com (DennisN) DennisN Hi, I'm starting a brand new thread for our favorite songs...
(the last one disappeared some time ago, and we have to have a new one, I think :smile:)

..a thread for any genre, any style of music, as Cole Porter once wrote, anything goes... :smile:

Anything Goes by Cole Porter...

Read more]]> 253 What establishes stability of a localized field solution? Wed, 14 Oct 2026 23:23:11 +0000 https://www.physicsforums.com/threads/what-establishes-stability-of-a-localized-field-solution.1086223/ urn:xenforo:thread:1086223 invalid@example.com (mblasco137) mblasco137 In nonlinear classical field theories that admit localized or topological solutions (for example, Skyrme-type or Faddeev–Skyrme-type models), what mathematical and numerical evidence is normally considered sufficient to distinguish a genuinely stable localized solution from a stationary...

Read more]]> 14 Invisible microbes ‘mining’ toxic mine waste in the Flinders Ranges, South Australia Wed, 14 Oct 2026 22:56:03 +0000 https://www.physicsforums.com/threads/invisible-microbes-mining-toxic-mine-waste-in-the-flinders-ranges-south-australia.1086481/ urn:xenforo:thread:1086481 invalid@example.com (Astronuc) Astronuc This subject was brought to my intention in the past day. It is of interest to many scientists.

Apparently, various microbes have been inhabiting an abandoned uranium mine in South Australia. Whereas interested parties have assumed that the phosphate deposits of uranium and lanthanide...

Read more]]> 0 Optics question - images and a glass rod with curved ends Pearson 34_76 Wed, 14 Oct 2026 18:33:02 +0000 https://www.physicsforums.com/threads/optics-question-images-and-a-glass-rod-with-curved-ends-pearson-34_76.1086459/ urn:xenforo:thread:1086459 invalid@example.com (rogue_system) rogue_system n1=1.00 (air), n2=1.60 (glass), R=6.00cm, s=24cm

(1/24) + (1.60/s') = (1.60-1.00)/6

Simplifying I get

[(0.60/6)-(1/24)]*1.60=1/s'=7/75

s'=75/7

This puts s' to the left hand (same side as incoming light) of the lens on the left hand side, so the distance to the lens on the right hand side...

Read more]]> 16 Combining several deembeding methods to make a more acurate result for s-parameters Wed, 14 Oct 2026 14:51:13 +0000 https://www.physicsforums.com/threads/combining-several-deembeding-methods-to-make-a-more-acurate-result-for-s-parameters.1086330/ urn:xenforo:thread:1086330 invalid@example.com (yefj) yefj Hello , I have built a script by the method described in the article.
it has dut with two fixtures on both side.

I have fixture-X_length-fixture and fixture-2X_length-fixture
what is the best strategy to extract the sparams of the dut.
the optical article is good and it uses only one s2p...

Read more]]> 1 Talent Worthy of Wider Recognition Wed, 14 Oct 2026 13:24:05 +0000 https://www.physicsforums.com/threads/talent-worthy-of-wider-recognition.1064653/ urn:xenforo:thread:1064653 invalid@example.com (Hornbein) Hornbein The double lead guitar technique was invented by George Harrison on Your Bird Can Sing but the style didn't catch on. Jimmy Page put it on the map in Ramble On, then the Allman Brothers made it their signature. I like double lead guitar because that unique soaring sound is something no other...

Read more]]> 147 Roulette system -- which optimization is better? Wed, 14 Oct 2026 12:30:04 +0000 https://www.physicsforums.com/threads/roulette-system-which-optimization-is-better.1048969/ urn:xenforo:thread:1048969 invalid@example.com (bernd) bernd Hey, gotta do some explanation first:
I assume you know how roulette works. (if you dont: ball is thrown into a pit and it can either land on red, black or zero, each having a certain likeliness to land there. you can bet on where the ball will land)
let's assume unrealistically you have the...

Read more]]> 15 The myth of two armies attacking Wed, 14 Oct 2026 10:43:46 +0000 https://www.physicsforums.com/threads/the-myth-of-two-armies-attacking.1086466/ urn:xenforo:thread:1086466 invalid@example.com (sbrothy) sbrothy Oh I forgot to say that I read that two armies seldom attacked as we always see on TV.


I read that somewhere (please don’t ask as I’m watching Braveheart right now.) I dont really buy it though as the vikings shield walls were very very real. You weren’t a warrior until you had participated in...

Read more]]> 6 Share Animal Pictures: For Animal Lovers Tue, 13 Oct 2026 20:13:19 +0000 https://www.physicsforums.com/threads/share-animal-pictures-for-animal-lovers.583729/ urn:xenforo:thread:583729 invalid@example.com (micromass) micromass Post your favorite animal pictures here!]]> 3082 How can a local interaction affect different parts of an atom? Tue, 13 Oct 2026 19:49:21 +0000 https://www.physicsforums.com/threads/how-can-a-local-interaction-affect-different-parts-of-an-atom.1086424/ urn:xenforo:thread:1086424 invalid@example.com (absolutegod) absolutegod Quantum mechanics says interection coordinate response of atom.

But atom parts i.e electron and nucleus are spatically separated.

However it is treated as one quantum system but been one quantum system doesn't make their distance in between 0.

So, how a local interaction coordinate response...

Read more]]> 17 What ever happened to Classical Unified Field Theory? Tue, 13 Oct 2026 17:06:20 +0000 https://www.physicsforums.com/threads/what-ever-happened-to-classical-unified-field-theory.1061062/ urn:xenforo:thread:1061062 invalid@example.com (Rick16) Rick16 Are there currently professional physicists who work on Einstein’s quest to unify the gravitational field and the electromagnetic field (as classical fields), or has this idea been completely abandoned? Is it simply a hopeless endeavour?]]> 6 A Slice of Bad Luck Tue, 13 Oct 2026 15:51:44 +0000 https://www.physicsforums.com/threads/a-slice-of-bad-luck.1086428/ urn:xenforo:thread:1086428 invalid@example.com (bob012345) bob012345 There are nine people at a party. Dessert is a variety of cheesecake slices on two platters. Each platter contains 12 slices of 6 varieties. The two platters are identical. What is the probability that someone will not get what they want?]]> 16 Lean Proof Found To Be False Tue, 13 Oct 2026 14:49:06 +0000 https://www.physicsforums.com/threads/lean-proof-found-to-be-false.1086465/ urn:xenforo:thread:1086465 invalid@example.com (Hornbein) Hornbein From AI. I'm too lazy to check it.
  • Publication: On July 25, 2026, Ramana Kumar published an AI-assisted Lean repository containing a sorry-free formal proof purporting to show that the Collatz conjecture was false by exhibiting an orbit that does not return to 1...

Read more]]> 8 Two dice are rolled... Tue, 13 Oct 2026 14:13:49 +0000 https://www.physicsforums.com/threads/two-dice-are-rolled.1086435/ urn:xenforo:thread:1086435 invalid@example.com (DaveC426913) DaveC426913 I'm putting this is the Fun 'n Games forum because if I put it in the Math forum I'd get answers in the form of formal probability notation, with elements and sets and unions and intersections.

While that's fine for those who know the notation, it's not very accessible for those who...

Read more]]> 53 Why time? Could physical change be more fundamental than time itself? Tue, 13 Oct 2026 14:05:11 +0000 https://www.physicsforums.com/threads/why-time-could-physical-change-be-more-fundamental-than-time-itself.1086467/ urn:xenforo:thread:1086467 invalid@example.com (RickMG) RickMG Hi all, My name is Ricardo Gomez, I'm a new member of this forum, and i have been pondering on this subject for quite a while and finally decided to post it and get more insights about it. So, if you read this, thank you for your time and appreciate it in advance.

I have no academic background...

Read more]]> 5 New Member - Independent Researcher (Fluid Dynamics & Emergent Gravity Tue, 13 Oct 2026 13:50:06 +0000 https://www.physicsforums.com/threads/new-member-independent-researcher-fluid-dynamics-emergent-gravity.1086469/ urn:xenforo:thread:1086469 invalid@example.com (samusite325) samusite325 Hello everyone,
I am an independent researcher focused on fluid spacetime analogies, emergent gravity, and modified stress-energy tensors. I have spent the last several years building a computational model of a transphasic fluid lattice, which I recently published and indexed via Zenodo and...

Read more]]> 3 Weird News Compilation Tue, 13 Oct 2026 08:17:51 +0000 https://www.physicsforums.com/threads/weird-news-compilation.878428/ urn:xenforo:thread:878428 invalid@example.com (Evo) Evo I'm always finding weird things in the news and thought it might be fun if we all shared odd stories we came across. Please feel free to post odd, funny or unusual stories in this thread.

Turns out that Zoobyshoe beat me in posting about this in another thread, so he will officially be known...

Read more]]> 2165 Work done by a variable force Tue, 13 Oct 2026 00:09:04 +0000 https://www.physicsforums.com/threads/work-done-by-a-variable-force.1086448/ urn:xenforo:thread:1086448 invalid@example.com (tashizzz) tashizzz TL;DR: Please point out any mistakes in solution . If there isnt why the work done by force come out to be equal to work done my gravity , and why when not moving it slowly there is an addittional term . If the work done is equal to Wd by gravity , I have read that work done by gravity...

Read more]]> 3 How exactly does convection motion start? Mon, 12 Oct 2026 20:47:41 +0000 https://www.physicsforums.com/threads/how-exactly-does-convection-motion-start.1086279/ urn:xenforo:thread:1086279 invalid@example.com (aletheia) aletheia I’m having trouble understanding how exactly non-equilibrium heat-transfer initiates convection, whether or not phase change is involved.

Consider the following experiments.

First: heating soy oil in a glass kettle on a regular gas stove; 4 probes — at the bottom, midway, near the surface...

Read more]]> 28 Bohmian Mechanics of DCES (swaps), featuring several papers Mon, 12 Oct 2026 20:02:23 +0000 https://www.physicsforums.com/threads/bohmian-mechanics-of-dces-swaps-featuring-several-papers.1086341/ urn:xenforo:thread:1086341 invalid@example.com (DrChinese) DrChinese NOTE: This is more or less a continuation of another closely related thread on Entanglement Swapping, especially Delayed Choice Entanglement Swapping (DCES) versions. More specifically, we are examining how DCES is viewed from the perspective of Bohmian Mechanics (BM).

Earlier thread...

Read more]]> 42 Hlo, i am a student and i am fascinated by astrophysics and theories Mon, 12 Oct 2026 18:50:46 +0000 https://www.physicsforums.com/threads/hlo-i-am-a-student-and-i-am-fascinated-by-astrophysics-and-theories.1086461/ urn:xenforo:thread:1086461 invalid@example.com (ROY3212) ROY3212 Hlo]]> 1 Why does the movement of electrons create fields? Mon, 12 Oct 2026 16:56:44 +0000 https://www.physicsforums.com/threads/why-does-the-movement-of-electrons-create-fields.1085988/ urn:xenforo:thread:1085988 invalid@example.com (spagettot) spagettot i know the electron are not the one to transfer energy and that the electric and magnetic field are the ones doing the job but why is the field created in the first place and even the "energy flowing with the fields" is still pretty abstract to me]]> 32 Stability of different X-Frame Spreader Beam geometries Mon, 12 Oct 2026 15:50:28 +0000 https://www.physicsforums.com/threads/stability-of-different-x-frame-spreader-beam-geometries.1086449/ urn:xenforo:thread:1086449 invalid@example.com (gen x) gen x How I can prove with physics that X-Frame Spreader Beam with 4 chains that goes to hook is more stable(less prone to CoG mismatch) then X-Frame Spreader Beam that have fixed hook at center of beam. Does in both case CoG of the load pass through steel cable from cran?

kryss-spridare-med-kattingar.fa8f08a9.webpimages.webp]]> 4 Could instrumental error be the cause of interference in radio telescopes? Mon, 12 Oct 2026 15:32:24 +0000 https://www.physicsforums.com/threads/could-instrumental-error-be-the-cause-of-interference-in-radio-telescopes.1086457/ urn:xenforo:thread:1086457 invalid@example.com (Line_112) Line_112 I recently read a paper by scientists about the results of a search for radio signals from extraterrestrial civilizations using the Chinese FAST telescope. After carefully screening out candidates, they were left with one particularly suspicious signal, emanating from the direction of the star...

Read more]]> 2 Latest Notable AI accomplishments Mon, 12 Oct 2026 13:56:04 +0000 https://www.physicsforums.com/threads/latest-notable-ai-accomplishments.937195/ urn:xenforo:thread:937195 invalid@example.com (gleem) gleem Developments in AI and machine learning continue to progress at a rate that may be surprising and not just in playing games but in pattern recognition and image analysis in medicine, astronomy and business. One of the challenges to AI is effective natural language processing. Last week both...

Read more]]> 131 Biographies, History, Philosophy of Physics Mon, 12 Oct 2026 09:08:58 +0000 https://www.physicsforums.com/threads/biographies-history-philosophy-of-physics.1060020/ urn:xenforo:thread:1060020 invalid@example.com (sbrothy) sbrothy arXiv: physics.hist-ph. History, philosophy:

Berta Karlik -- The Grande Dame of the Vienna Radium Institute

Berta Karlik was an Austrian physicist who was not only among the early radioactivity researchers and nuclear physicists in Vienna, but also pioneered a woman's academic...

Read more]]> 309 Star Drek Mon, 12 Oct 2026 08:47:43 +0000 https://www.physicsforums.com/threads/star-drek.1086456/ urn:xenforo:thread:1086456 invalid@example.com (sbrothy) sbrothy I’m probably the only one who haven’t seen this piece of, yeah well, drek. But just in case here you go:

Star Drek]]> 2 Virtual Mechanical Engineering Mon, 12 Oct 2026 07:09:13 +0000 https://www.physicsforums.com/threads/virtual-mechanical-engineering.1086450/ urn:xenforo:thread:1086450 invalid@example.com (Hornbein) Hornbein Virtual mechanical engineering. The best designs have a visible ingenuity sorely lacking in software engineering. I once wrote a program that opened four relays. In twenty years that was my only tactile feedback.



I like the narrator's wry ironic tone about his pastime. As...

Read more]]> 1 Hurricane anti-spin at extreme velocities - realistic solution? Mon, 12 Oct 2026 04:10:59 +0000 https://www.physicsforums.com/threads/hurricane-anti-spin-at-extreme-velocities-realistic-solution.1086453/ urn:xenforo:thread:1086453 invalid@example.com (chasrob) chasrob Okay, I’m writing a novel with the protagonist who acquires super powers. He’s what’s called a Flying Brickhttps://tvtropes.org/pmwiki/pmwiki.php/Main/FlyingBrick, similar to Superman of the comics. He is not popular with the general public, for reasons. One of which is he refuses to act...

Read more]]> 3 Why does voltage drop become more noticeable in longer LED circuits? Sun, 11 Oct 2026 22:56:31 +0000 https://www.physicsforums.com/threads/why-does-voltage-drop-become-more-noticeable-in-longer-led-circuits.1086420/ urn:xenforo:thread:1086420 invalid@example.com (cedricuk) cedricuk I've been trying to understand voltage drop in longer low-voltage LED circuits from a physics perspective.

If the supply voltage is constant, increasing the length of the conductor increases the total resistance. With the same current flowing through the circuit, this should produce a larger...

Read more]]> 16 Does time stop for objects traveling at light speed? Sun, 11 Oct 2026 22:23:43 +0000 https://www.physicsforums.com/threads/does-time-stop-for-objects-traveling-at-light-speed.1084211/ urn:xenforo:thread:1084211 invalid@example.com (spacecadet2563) spacecadet2563 As you move closer to the speed of light time begins to slow down for those looking from Earth. But time on the ship is normal for them. Go faster and slows down even more. Same thing. Time is normal. But I read when it reaches speed c the time on the ship goes to zero. I say wrong. Its still...

Read more]]> 29 Random Thoughts 7 Sun, 11 Oct 2026 17:42:13 +0000 https://www.physicsforums.com/threads/random-thoughts-7.1056780/ urn:xenforo:thread:1056780 invalid@example.com (Evo) Evo Time to start a new thread.

Here is the last page of part 6.

https://www.physicsforums.com/threads/random-thoughts-part-6.875108/page-317#post-6960672]]> 2060 Flooding in Nepal - Glacier Collapse Sun, 11 Oct 2026 16:17:34 +0000 https://www.physicsforums.com/threads/flooding-in-nepal-glacier-collapse.1086099/ urn:xenforo:thread:1086099 invalid@example.com (Point Conception) Point Conception https://www.yahoo.com/news/world/articles/foreign-tourists-missing-nepals-flash-155744585.html. Screenshot_20260827_083401_Google.webpScreenshot_20260827_083446_Google.webpScreenshot_20260827_083459_Google.webp]]> 20 Mounting an antenna for aircraft and marine listening Sun, 11 Oct 2026 15:56:38 +0000 https://www.physicsforums.com/threads/mounting-an-antenna-for-aircraft-and-marine-listening.1086410/ urn:xenforo:thread:1086410 invalid@example.com (Guineafowl) Guineafowl I live about 3-4 miles from the Moray coast, elevation 24m, and within 20 miles of Inverness airport and an RAF base, so picked up a cheap secondhand Uniden Bearcat UBC360CLT scanner, capable of many frequencies between 25-960 MHz. The plan was, to see what I can pick up around 120 MHz for...

Read more]]> 8 I have a couple of questions about general relativity Sun, 11 Oct 2026 12:30:20 +0000 https://www.physicsforums.com/threads/i-have-a-couple-of-questions-about-general-relativity.1086443/ urn:xenforo:thread:1086443 invalid@example.com (Uri Zlatnik) Uri Zlatnik From a very young age, we are often told that space is a vacuum and a vacuum contains no matter and energy.

What we are also told from a very young age is that something cannot come from nothing.

So if a vacuum contains no matter or energy or even nothing at all then how can it curve or...

Read more]]> 10 Was Richard Feynman's explanation of the twin paradox wrong? Sun, 11 Oct 2026 11:03:40 +0000 https://www.physicsforums.com/threads/was-richard-feynmans-explanation-of-the-twin-paradox-wrong.1086141/ urn:xenforo:thread:1086141 invalid@example.com (gen x) gen x Here Tim Maudlin explain that acceleration is not reason why one twin become younger, and that Feynman explained that wrongly?
Is this correct and can you explain what he want to say?


]]> 47 Bell's theorem and measurements not done Sun, 11 Oct 2026 09:31:08 +0000 https://www.physicsforums.com/threads/bells-theorem-and-measurements-not-done.1085467/ urn:xenforo:thread:1085467 invalid@example.com (Ben vdP) Ben vdP I wanted to have a quick check on how Bell's theorem was formulated so consulted the wiki page:

https://en.wikipedia.org/wiki/Bell's_theorem

But then saw the following odd section:

=====

Hypothetical characters Alice and Bob stand in widely separated locations. Their...

Read more]]> 15 Is there simpler way to approach this particle collision problem? Sun, 11 Oct 2026 08:36:58 +0000 https://www.physicsforums.com/threads/is-there-simpler-way-to-approach-this-particle-collision-problem.1086447/ urn:xenforo:thread:1086447 invalid@example.com (joturttle) joturttle I was able to solve the problem, but my solution feels lengthy so i was curious if there was a mathematicallly simplier way to approach this problem.
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IMG_1822.webp]]> 2 Best visualization of SO(3) Sun, 11 Oct 2026 05:56:19 +0000 https://www.physicsforums.com/threads/best-visualization-of-so-3.1086092/ urn:xenforo:thread:1086092 invalid@example.com (Matterwave) Matterwave I know a decent number of properties of SO(3) and obviously I can visualize the group action on three space as rotations. But a good visualization of the group itself eludes me.

SU(2) is somehow more intuitive to visualize since it simply is ##S^3##. So I just think of a 2-d sphere and say...

Read more]]> 35 Do photons experience zero time between emission and absorption? Sat, 10 Oct 2026 22:05:56 +0000 https://www.physicsforums.com/threads/do-photons-experience-zero-time-between-emission-and-absorption.1084214/ urn:xenforo:thread:1084214 invalid@example.com (spacecadet2563) spacecadet2563 Not a great question but I heard someone say that time does not move for a photon. T=0.
So therefore both its Emission &Absorption are simultaneous events. I say no. If both of these events are supposed to be considered different events than there would need to be a time interval between them...

Read more]]> 15 How to treat your AI models Sat, 10 Oct 2026 21:12:30 +0000 https://www.physicsforums.com/threads/how-to-treat-your-ai-models.1086434/ urn:xenforo:thread:1086434 invalid@example.com (Borg) Borg Anthropic is banning cruel or abusive behavior toward its models after a project was set up to purposely torture them.

https://www.engadget.com/2281765/an...usive-or-cruel-behavior-toward-its-ai-models/

Reminds me of this. :oldtongue:
1791534490422.webp]]> 3 Which MSc thesis would be better for jobs after graduation? Sat, 10 Oct 2026 21:08:21 +0000 https://www.physicsforums.com/threads/which-msc-thesis-would-be-better-for-jobs-after-graduation.1086423/ urn:xenforo:thread:1086423 invalid@example.com (shneebnee) shneebnee I’m choosing between two master's thesis projects.

One is gravitational-wave modelling for LIGO-related stuff, mostly numerical code optimisation, C, Fortran, JAX, GPU/CUDA and HPC.

The other is telescope data reconstruction for AtLAST/MUSTANG-2, mainly Python/JAX, GPU computing, bayesian...

Read more]]> 2 Hello Sat, 10 Oct 2026 17:04:29 +0000 https://www.physicsforums.com/threads/hello.1086442/ urn:xenforo:thread:1086442 invalid@example.com (purehalos) purehalos Hello.]]> 2 What are the Implications of this thought I had? Sat, 10 Oct 2026 11:45:05 +0000 https://www.physicsforums.com/threads/what-are-the-implications-of-this-thought-i-had.1086391/ urn:xenforo:thread:1086391 invalid@example.com (mr3000) mr3000 For any natural number n, there exists an infinite number of natural numbers higher than n, and a finite number of natural numbers smaller than n. Therefore, n is always infinitely closer to 0 than infinity

What does this mean?]]> 8