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Atmospheric pressure
Atmospheric pressure is the pressure exerted by the weight of the air above a surface.
Boyle’s law
Boyle’s law states that pressure is inversely proportional to volume at constant temperature.
Kinetic energy
Kinetic energy is the energy an object possesses due to its motion.
Pressure
Pressure is force exerted per unit area on a surface.
Vacuum
A region with very low gas particle density and pressure, but not necessarily zero particles.