Question

What is the need of atmospheric pressure ?

Answer 1

it helps us to be on the surface and on each 760mm 1 kg of pressure

Answer 2

Atmospheric pressure, also known as barometric pressure, is the pressure within the atmosphere of Earth. The standard atmosphere is a unit of pressure defined as 101,325 Pa, which is equivalent to 760 mm Hg, 29.9212 inches Hg, or 14.696 psi.

Pressure (p) , mass (m) and the acceleration due to gravity (g) are related by P = $\frac{F}{A} = \frac{(m*g)}{A}$ where A is surface area.

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