Question

Question:Because atmospheric pressure is about and the area of a person’s chest is about, the force of the atmosphere on one’s chest is around. In view of this enormous force, why don’t our bodies collapse?

Short answer

Theairinsideourbodyhasthesamepressureastheairwearebreathingin.

Step-by-step solution

Bernoulli’s equation

The sum of the pressure, kinetic energy per unit volume, and gravitational potential energy per unit volume has the same value at all points along a streamline for an ideal fluid. This result is summarized in Bernoulli’s equation:

P+$\frac{1}{2}\rho V^{2+\rho gh=cons\tan t}$

Where

P =Pressure of fluid

V =Volume of fluid

$\rho =$Density of fluid

h =Height of fluid in pipe

Find why our bodies don’t collapse

• Itssimplestanswerisbreathinginair, howletseethis, theairinsideourbodyhasthesamepressureastheairwearebreathingin. thereisanexampletoproveit:
• Ifadeepwaterdiveriscomingoutofthewater, heneedstoexhalealltheairinhislungonthewayup. Thatisbecauseheisbreathinginpressurizedairunderwaterandthedeepwaterpressureismuchhigherthanatmosphericpressure.
• If the diver fails to exhale enough amount of air, his lung would explode on the way up. If his lung is at a high pressure, in low pressure environment, the pressurized air would expand, which leads to injury of the lungs.