why gases exert pressure in all direction
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Gases contain small molecules separated by great distances and moving very very fast in all random directions. The gas molecules move at speeds of million meters or more per sec.
Gas molecules collide among themselves. They collide against the walls of the container they are in. They get the kinetic energy from the temperature and heat taken from the surroundings.
The collisions with the boundary walls of the container, creates a lot of change in their momentum. That change in momentum results in a force, as per Newton's Second law. The force on the surface results in pressure.
Since the gas molecules have random movement in all directions, and they get bounced back in all random directions, they exert (equal) pressure in all directions.
Gas molecules collide among themselves. They collide against the walls of the container they are in. They get the kinetic energy from the temperature and heat taken from the surroundings.
The collisions with the boundary walls of the container, creates a lot of change in their momentum. That change in momentum results in a force, as per Newton's Second law. The force on the surface results in pressure.
Since the gas molecules have random movement in all directions, and they get bounced back in all random directions, they exert (equal) pressure in all directions.
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