Question

Define pressure.State its SI unit and define it.

Answer 1

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. The conversion between atm, Pa, and torr is as follows: 1 atm = 101325 Pa = 760 torr.

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Answer 2

Pressure is an expression of force exerted on a surface per unit area. The standard unit of pressure is the pascal (Pa), equivalent to one newton per meter squared (N/m 2 or N. ... Alternatively, pressure can be measured in dynes per centimeter squared (dyn/cm 2 or dyn. · cm -2).