Heya give definition of pressure...
Answers
Answer:
Heya...
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.
Explanation:
Pressure is the forces exerted by particles as they bang around each other and into other things.
In physics, the simple formula for pressure is P = F/A. Or in plain words, Pressure is equal to Force per unit Area.
Or if you need to figure out pressure for fluids, such as underwater, you can determine it by using P = p x g x h or pressure is equal to the fluid's density multiplied by gravitational force and the vertical height of all the fluid from your measurement point.
Atmospheric pressure is simply the air particles zipping around endlessly (imagine a billiard game that never ends or stop) and hitting each other and the earth surface (which might include you). As they hit the surface of the earth, they impart a force on the surface, the same as you would if you hit someone. This is what we measure as atmospheric pressure.