Mechanics Educational Materials

Stories of birds that start fires!

2025-05-19T22:59:00.000-07:00

For generations, Aboriginal Australians told stories of birds that start fires. These accounts were often dismissed as myth... until now.

Recent research confirms that at least three species of raptors in Australia — the black kite (Milvus migrans), the whistling kite (Haliastur sphenurus), and the brown falcon (Falco berigora) — intentionally spread wildfires. They pick up burning sticks with their beaks or claws and drop them into dry grass to flush out prey. As animals flee the fires, the birds feast.

It’s a rare and remarkable example of tool use in birds — and a reminder that traditional knowledge often sees the truth long before science catches up. 🔥🦅

Breaking the sound barrier: The plane's journey beyond the maximum speed

2025-01-06T01:02:00.000-08:00

For a plane to break the sound barrier, its speed must exceed about 1200 km/h, which is the speed of sound in air at a temperature of 15 degrees Celsius.

What happens when breaking the sound barrier?

1. Reaching the speed of sound:
At this point, the sound waves accumulate in the front of the plane, forming what is known as the "shock wave", which is a high-pressure area.

2. Breaking the speed of sound:
When the plane increases its speed to become faster than sound, the shock wave travels to the back of the plane.

The sound heard on the ground: The explosion heard on the ground is the result of the shock wave leaving its trace behind the plane.

3. The steam cone:
The smoke or cone shape that appears behind the plane is nothing but a steam cone, resulting from a sudden drop in air pressure due to the shock wave.

The distinctive results

Noise: The sound of the "sonic explosion" made by breaking the sound barrier is heard as a loud and sudden noise.

Visual effect: The steam cone is a wonderful visual spectacle that highlights the moment of transition to supersonic speed.

Breaking the sound barrier demonstrates incredible engineering progress and underscores the power of technology to overcome the limits of nature.

A terrifying story is happening now at NASA mission .

2024-09-03T01:53:00.000-07:00

The most important news you can hear right now and everyone is talking about it!

Simply put, the astronauts in front of you, moved on June 5th (two months ago) on a NASA mission, they will go up to the International Space Station and stay for 8 days to do their work and return again in the Starliner spacecraft in front of you, owned by Boeing aircraft company!

On their way up, problems began to appear in the spacecraft's engine, its jet thrusters, as well as helium gas leaks and such, so NASA sent them a message telling them that it is dangerous for you to return with it, so leave it connected to the space station and we will send you something to bring you back!

NASA does not have vehicles ready to travel, or shuttles, so it sent to Boeing, do you have something ready now? It told NASA that it will cost you a lot, so it sent to Elon Musk, do you have something ready? He told them that he would be on a trip that would leave him at the end of September and return in February 2025! There is no problem if we let two people stay, so that we can make room for the astronauts to return with them! NASA told him, "Great job."

The agency went to the astronauts and told them, "Sorry, you have been with them for two months, so please be patient a little bit more until February of next year. Elon will take you with him on his way back in SpaceX, and so far nothing strange!"

The strange thing that the whole world is talking about is that the astronaut called NASA and told them there was a voice coming from outside the capsule! I don't know what's going on! NASA told him it could be wave interference or something loose or metal hitting the capsule or something inside it that's broken! They entered the capsule and opened the cameras around it, there is nothing around it, no leakage, no sound waves (I will put the recording between them in the comments and the sound), NASA showed the sound to different scientists specializing in space sciences, they said the sound is similar to pulses, but it is not interference at all and no sound from Earth for sure, and this is strange to us in all stages of our work or previous experiences!

The last "recorded" call between NASA and the astronaut, he tells them the sound is not coming from anything in the capsule or spacecraft, no, the sound is coming from outside the capsule! And he opened the speaker and heard them more than once!

The idea is just that space is a vacuum! There is no sound or sound waves traveling in it, where is this sound coming from and how!

This is not science fiction, this is real and is happening now and it is recorded.

What's the name of this tool?

2023-11-30T03:36:00.000-08:00

Guess the name of this tool.

Only profisional technician will know the name of this tool.

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2- share the post for your friends

What is this ?

2023-11-28T02:35:00.000-08:00

What's this please?

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Only a genius can solve this

2023-11-17T14:22:00.000-08:00

Only genius can solve this challenge

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Solve if you are genius

2023-11-12T23:31:00.000-08:00

Only genius can solve this challenge

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What's this please?

2023-11-07T23:24:00.005-08:00

What's this part please?

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Why do planes leave white lines in the sky?

2023-10-29T04:23:00.008-07:00

Are you wondered Why do planes leave white lines in the sky? Let's discover the secret behind this.

Jet planes leave white trails in the sky for the same reason you can sometimes see your breath on cold days. The hot, humid vapor coming out of jet engines mixes with the Earth's atmosphere.

The air in these layers has a lower pressure and temperature than jet engine steam, where it condenses. The water vapor in the jet exhaust may sometimes freeze, forming a cloud very similar to the one your hot breath creates on a cold day.

Jet engine steam contains carbon dioxide, sulfur oxides, nitrogen, unburned fuel, some metal particles, as well as water vapor. This mixture helps condense water vapor in the high layers of the atmosphere.

Therefore, depending on the altitude of the aircraft and the temperature and humidity of the atmosphere, these effects may vary in thickness, extent, and duration. The nature and continuity of the effects of jet engines can be used to predict the weather.

A thin, short-lived line indicates low-humidity air at high altitudes and is a sign of moderate weather, while a long-lived thick line reflects the presence of humid air at high altitudes and can be an early indicator of a storm. .

What's the name of this tool?

2023-10-26T00:03:00.003-07:00

What's is name of this tool?

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