Pressure
Pressure is the force that acts upon a given surface area.
Pressure exerted by fluids.
Brownian Motion
Brown was looking at pollen grains on the surface of water under a microscope. The small particle moved erratically and was constantly being jerked around.
The small particle was being hit by gas particles. Every action has an equal and opposite reaction, and thus the particle is moved in the opposite direction as to where the gas particle hit it. As gas particles are moving randomly and at random speeds, this resulted in the particle being moved erratically and in different directions.
This is Brownian Motion.
Brownian motion is evidence of how gas particles move, and therefore is evidence of Kinetic Theory.
Kinetic Theory explains gas pressure.
Movement of gas particles cause particles to bounce off walls of container. As they bounce off, small force is exerted. Billions of small forces on given area causes gas pressure.
The small particle was being hit by gas particles. Every action has an equal and opposite reaction, and thus the particle is moved in the opposite direction as to where the gas particle hit it. As gas particles are moving randomly and at random speeds, this resulted in the particle being moved erratically and in different directions.
This is Brownian Motion.
Brownian motion is evidence of how gas particles move, and therefore is evidence of Kinetic Theory.
Kinetic Theory explains gas pressure.
Movement of gas particles cause particles to bounce off walls of container. As they bounce off, small force is exerted. Billions of small forces on given area causes gas pressure.