- Pressure is determined as force per unit area of the surface. The SI unit of pressure, pascal is as shown below.
1 Pa = 1 N ${{m}^{-2}}$
If the mass of air at sea level is 1034 g${{cm}^{-2}}$, calculate the pressure in pascal.
Pressure is the force or weight per unit area.
Pressure = 1034 g x 9.8 ${{ms}^{-2}}$ / ${{cm}^{2}}$
= 1034 g x 100 x 100 x 9.8 ${{ms}^{-2}}$ / 1000 ${{m}^{2}}$
= 101322.0 N ${{m}^{-2}}$
= 1.01322 x ${{10}^{5}}$ Pa