Physics in our Life!

When volume of a gas is decreases at constant temperature .
Its density increases, and I.M.S decreases, therefore rate of impacts increases, and pressure increases .

When the gas is heated at constant pressure ?
Vrms increases therefore, the IMS increases and the gas expands, therefore its volume increases V  a  T

When the gas is heated at constant volume ?
Vrms increases and the rate of collision (impacts) increases, therefore its pressure increases P  a   T

The Earth keeps no hydrogen in its atmosphere ?
Because hydrogen molecules have small mass so they gain the escape velocity and overcome the Earth's gravity  .

Vrms of gas molecules is independent on pressure ?
Because increasing the pressure decreases its volume , also increase the density .