Question

What is the absolute pressure of the air in your car's tires, in psi, when your pressure gauge indicates they are inflated to 39.0 psi ? assume you are at sea level?

Answer 1

We are simply given the gauge pressure of the tire which is equal to 39.0 psi. So to get the absolute pressure, we must add this by the atmospheric pressure of the surrounding which is 14.70 psi.

abs pressure = 39 psi + 14.7 psi

abs pressure = 53.70 psi