Question

what is pressure......

Answer 1

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✔Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure is the pressure relative to the ambient pressure. Various units are used to express pressure.
In SI base units: 1 N/m2, 1 kg/(m·s2), or 1 J/m3
SI unit: Pascal...

✔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

✔✔Hope it helps you... ✔✔

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Answer 2

The force acting per unit area on a surface acting in a perpendicular direction to it is called pressure.

S. I unit of pressure is Pascal (Pa)