Question

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Answer 1

pressure = Pressure means how much something is pushing on something else. It is expressed as force per unit area: P=F/A. In technology, pressure is often specified in multiples of atmospheric pressure. It can also be defined as the thrust [compressive force acting perpendicularly to the surface of a body] acting per unit area.

pressure is a scalar quantity, not a vector quantity. It has a magnitude but no direction associated with it. ... At the surface of a gas, the pressure force acts perpendicular to the surface. If the gas as a whole is moving, the measured pressure is different in the direction of the motion.

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