tag:blogger.com,1999:blog-2591542817011897132024-10-24T14:19:49.496+05:30"Only those questions are foolish which are not asked"Unknownnoreply@blogger.comBlogger75125tag:blogger.com,1999:blog-259154281701189713.post-13934755757465955492015-05-09T09:43:00.002+05:302015-05-09T09:43:32.026+05:30

A block at a height of 50 meters having mass 5 kg is allowed to fall hits a bullet moving with a velocity of 300 meters per second & stucks into it at the mean position...what height can it attain now?Regards,farhan

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-86599489469353661762015-05-09T09:42:00.001+05:302015-05-09T09:42:07.279+05:30

Q. One brass plate is inserted between 2 charges. The force between two charges willa. remain sameb. increasec. decreased. fluctuateexplain with reasonRegards,Ayush Goyal

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-41371015015480148462015-05-09T09:39:00.003+05:302015-05-09T09:39:48.231+05:30

what is the main reason for choosing 32 degree as ice point n 212 degree as steam point in fahrenheit scale?In celsius they refer to water, but what about here? similarly what about Reaumur scale?Regards,krishna 

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-23340729170836146122015-04-14T19:41:00.001+05:302015-04-14T19:41:04.618+05:30

Hello,I understand that because of time dilation that we could never see something actually entering a black hole.  That is to say, from our earth view, time would appear to stop at or near the event horizon and observed objects would appear to move slower and slower until they seemed to be standing still (to be clear, I certainly understand that the object does not actually halt its motion

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-48554224319882423202015-04-14T19:40:00.002+05:302015-04-14T19:40:14.494+05:30

Two identical pith balls,each carrying a charge q,are suspended from a common point by two strings of equal length l.find the mass of each ball if the angle between them is 2x in equilibrium.Regards,Ayash Mohanty

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-69154954264103191092015-04-14T19:39:00.003+05:302015-04-14T19:39:40.687+05:30

if an alternating current of frequency 50 hz is flowing through a conducting wire then how many times the current becomes zero in 1 second Asked Aniketh

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-45861956569013439482015-04-14T19:38:00.002+05:302015-04-14T19:38:48.148+05:30

A transparent sphere of radius R and refractive index of u is kept in air. At what distance from the surface of sphere should a point object be placed so as to form real image at same distance from sphere?Regards,shivendu [R / (u-1)] - R Try yourself with lensmakers formula The optic centre is at the centre of the sphere. SO the surface is already at a distance R from the optic centre.

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-70513644560571512652015-04-14T19:34:00.000+05:302015-04-14T19:34:02.622+05:30

I have once come across a materiel / substance / compound / or something that keeps objects cut off from the earth's gravitational pull.  In other words this will keep the object suspended in the air and will not allow it to touch the ground.  Hence we can say that this is a barrier between the object and the earth's gravity.  Can you please give me the name of this material /

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-55113496048779524992015-04-14T19:32:00.001+05:302015-04-14T19:32:41.740+05:30

A Hammer weighing 3kg strikes the head of a nail with a speed of 2m/s and drives it by 1cm into the wall. find the impulse? Asked Sree Impulse is the product of force an time. Impulse of a force is also equal to the change in momentum produce. (Impulse Momentum Principle) Here change in momentum is equal to 3kg x 2m/s = 6 kg m/s.  (if we assume that the hammer does not bounce

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-77875687688521113152015-04-14T19:25:00.002+05:302015-04-14T19:25:53.161+05:30

Acceleration is a vector quantity and therefore acceleration due to gravity too is vector. Acceleration due to gravity has magnitude as well as direction. The direction of acceleration due to gravity is towards the centre of earth.

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-51739994836797528892015-04-01T19:21:00.000+05:302015-04-01T19:21:27.794+05:30

We get many questions here which are intended to be asked to a psychic reader. But we are not those. We deal with Physics here ... often referred to as the true science explaining the various natural phenomena using cause effect relationship and more.

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-64314876878369554732015-04-01T19:16:00.001+05:302015-04-01T19:16:47.854+05:30

1. A man while beating a drum at the rate 5 per second walks toward a cliff till echo of beating dissappears completely. He walks at the rate of 8 km/hr. Calculate the distance of man from cliff in the beginning if he walked for 5 minute(Velocity of sound in air=350m/s). 2. A source emitting sound of frequency 180 Hz is placed in front of a wall at a distance of 2m from it. A

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-50538441548124533582015-04-01T19:14:00.002+05:302015-04-01T19:14:37.557+05:30

if force, velocity, and time are taken as fundamental units then how can be find out the dimension of mass Asked anupama at www.plustwophysics.com

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-21835435912669063342015-04-01T19:08:00.000+05:302015-04-01T19:10:00.951+05:30

in electric field, a 6.75uc charge experiences 2.5 N force , when placed at distance of 5m from the origin. then potential gradient at this point? GIVE FULL SOLUTION. Regards,vaibhav s. ugale

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-38045485345454026122015-03-31T21:26:00.001+05:302015-03-31T21:26:41.835+05:30

Has anyone considered that gravity and time are inversely related?  Since it seems that time seems to come to a virtual stop beyond the event horizon of a black hole, maybe that's because whatever 'causes' time is pushed out of the way by gravity.  The same might also explain the relativistic effects regarding the passage of times on objects approaching the speed of light.  I mean

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-56269079910950110362015-03-25T19:48:00.001+05:302015-03-26T07:17:42.745+05:30

Harilal asked: “During the big bang it is supposed that the small particles expanded in a very very small interval of time and there was nothing before that. If it is so, then how can it in be good agreement with law of conservation of mass?” Ans: After the Big Bang, the universe expanded rapidly. The big bang theory is not a theory which is completely resolved. There are many questions to be

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-64815231482395297732015-03-25T19:45:00.002+05:302015-03-25T19:47:17.618+05:30

DIVYA asked: “WHAT IS THE  MAGNITUDE OF ELECTRIC  FIELD IN THE  GAUSSIAN SURFACE OF  A CUBE,AT ITS FACE ,AT ITS CENTRE, AT ITS CORNERS OR AT ANY OTHER POINT INSIDE THE CUBE. ALSO TELL ME THE THE WAY TO KNOW IT.” Ans: According to Gauss Theorem, the total electric flux through a closed surface, The Gaussian surface is an imaginary surface. So, for calculating the electric

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-79700734132310391152015-03-25T19:44:00.003+05:302015-03-25T19:44:27.153+05:30

Mary Beth asked: “if you set up a pendulum aboard an orbiting space vehicle, would the period be less than, the same as, or greater than it would be in our lab? explain.” Ans: In a space vehicle orbiting around the earth, the apparent weight is zero as the entire gravitational pull is being utilized in providing the centripetal force required for revolving. This is called weightlessness in

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-76242018218495076072015-03-25T19:27:00.003+05:302015-03-25T19:36:55.488+05:30

Michelle Guzman Asked: If you set a pendulum atop Mt. Everest, would the period be less than, greater than or equal to the period you would get in the lab?  Explain. Ans: As you know, the acceleration due to gravity decreases as we go upwards from surface of earth. The time period of a simple pendulum is given by Where l is the length of the pendulum, and g is the acceleration due to

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-23070076031388513322015-03-25T19:27:00.000+05:302015-03-25T19:27:00.319+05:30

Atul asked: A lorry and a car moving with the same KE are brought to rest having same retarding force .which one of them should come at rest at shorter distance. Ans: According to Work Kinetic Energy theorem Both should stop travelling the same distance (This was a quick answer without a deep thought. If the readers have a diffrent opinion, please comment)

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-89734493140730760022015-03-25T19:26:00.001+05:302015-03-25T19:26:12.412+05:30

Prince Patel Asked: “Sun have high gravitational energy ,then why planets of solar system doesn’t colloid with sun?” Answer: “The planets are moving around the sun and the gravitational force is used in providing the necessary centripetal force (The force required by a body to move in a circular path). As long as the planets are in motion, they will not move towards the sun. A similar

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-46665055007632150592015-03-25T19:25:00.002+05:302015-03-25T19:25:34.693+05:30

Jyothir Asked: In photoelectric effect, what happens to the photon after it collides elastically with the electron ? Ans: The photon is completely absorbed by one electron, the energy of the electron provides the work function which is equal to the binding energy of the electron and the balance energy appears as the electrons Kinetic energy. As Einstein's Photo electric equation suggests

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-60498190250389174842015-03-25T19:24:00.002+05:302015-03-25T19:24:13.299+05:30

Namrata Asked: What is hysteresis? I only know its related to the frequency. Ans: Hysterisis mens “Lagging Behind” Hysteresis phenomena occur in magnetic materials, (as well as in the elastic, electric, and magnetic behavior of materials,) in which a lag occurs between the application and the removal of a field (or force) and its subsequent effect The lack of retraceability of the

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-87032666554751143672015-03-25T17:52:00.001+05:302015-03-25T17:52:28.399+05:30

1. Is there possibility to transport people upstairs by mechanism of Archimedes' screw? 2. Is there possibility to transmutate Carbon Dioxide to Helium? At what energy expand it is possible if any? Asked Jacez Do you know the answer have any comments please respond

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-259154281701189713.post-48787935632243672392015-03-21T19:48:00.000+05:302015-03-21T21:08:59.995+05:30

If we heat a metal for a certain period and at a certain heat it radiates EM waves (light). If we perpetuates to heat it for a long time will the mass of the metal body gets affected? Eswar asked Answer: Small changes in Temperature will not change the mass. But if heated at high temperature for long time, the answer is yes, unless the loss of mass by other means is not prevented. I'll

Unknownnoreply@blogger.com0