Question

define pressure?how is it calculated? what is the si unit of pressure

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

Answer 2

Definition -

• The amount of force applied on a unit square area is known as pressure. Pressure tells us how much force is acting on a unit square area.

Calculation -

• Pressure is calculated as -
• $\frac{Force \: / \: Thrust }{Area}$

SI unit -

• The SI unit of Pressure is the division of the SI units of the quantities.
• As we cannot Divide Newton by m². We will keep the units as it is.
• So, SI unit of Pressure is -
• $\frac{n}{ {m}^{2} } = \frac{(SI \: unit \: of \: Force)}{(SI \: unit \: of \: Area)}$
• The SI unit of pressure is also known as Pascals.
• Hence -
• 1 $\frac{n}{ {m}^{2} }$ = 1 Pascal

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