Question

please define please its urjent ​

Answer 1

Answer:

Pressure—the effect of a force applied to a surface—is a derived unit, obtained from combining base units. The unit of pressure in the SI system is the pascal (Pa), defined as a force of one Newton per square meter.

That pressure is called atmospheric pressure, or air pressure. It is the force exerted on a surface by the air above it as gravity pulls it to Earth. Atmospheric pressure is commonly measured with a barometer

Explanation:

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Answer 2

Answer:

Force acting on unit area of a substance is called pressure. Formula is : Pressure = Force/area.

Unit is Pascal (Pa).