Question

What is the expected pressure of air in the lungs of a diver at 4 meters below sea level?

Answer 1

The water pressure is about 10kpa per meter. If we add that pressure with the atmospheric pressure it comes upto 140 kpa

Answer 2

Given :

Depth below the sea level = 4m

To Find :

The pressure of air in the lungs of the diver

Solution :

• The atmospheric pressure of the air also called as air pressure is 1 bar (or) 1×10⁵ pascals

• For every one meter depth below the sea level the pressure nearly increases by one bar

       $P=P_{0}+ \rho gh$

       $P=P_{0} +(1000\times9.8\times4)$

       $P=1\times10^{5}+ 0.392\times10^{5}$

       $P=1.392\times10^{5}pa$

       $P=1.392bar$

The pressure of air in the lungs of the diver is 1.392 bar