Question

If mass of air at sea level is 1034 g/ cm2 calculate the pressure in pascal

Answer 1

Answer:

Explanation:

Pressure is the force acting per unit area.  Thus, Pressure = Force

But weight = mg

Thus,

Mass = 1034g = 1.034 kg

Force = mg = 1.034×9.81 N = 10.143 N

P = 1.034 x 10-4 x 9.80 ms-2 x 1 kg x 102 cm2

P = 1.013 X 10`5 kgm-1s-2

Now 1 N= 1kgms-2

So 1 Pa = 1Nm-2 = 1kgms-2 m-2

1 Pa = 1 kg m-1s-2

Pressure = 1.013 x 10`5 Pa