The problem is incomplete. Check the attached file.
If PGas is equal to 1.36 * 10^4
and PAtmos is equal to 1 atm
Plugging that in our formula given in the file. The answer would be:
1.36 * 10^4 / 1 atm = 0.134221564
Particles in a SOLID have a small amount of energy, vibrate, and are stuck in place?
Yeah what do you want me to answer for this question?
No. What most people call 'terminal velocity' is the speed of the falling
object when the downward force of gravity is equal to the upward force
of air resistance. At that speed, the vertical forces on the object are
balanced, so it stops accelerating, and falls at a constant speed.
If there were no atmosphere, there would be no upward force due to
air resistance. The falling object would continue to accelerate all the
way down until it went 'splat'.
This is exactly the situation for meteoroids or asteroids falling onto the Moon.
Answer:
The Sun-Earth-Moon system happens to exhibit a striking geometric coincidence, which we examine in the first problem. PROBLEM 1. To an observer on Earth, the Sun and the Moon subtend almost the same angle in the sky. The average angle is 0.52 degrees for the Moon and 0.53 degrees for the Sun.