When the temperature of an automobile tire is 20°c, the pressure in the tire reads 32 psi on a tire gauge. (the gauge measures the difference between the pressures inside and outside the tire.) what is the pressure when the tire heats up to 40°c while driving? you may assume that the volume of the tire remains the same and that atmospheric pressure is a steady 14 psi.

The initial pressure in the tire is given by the difference between the gauge pressure and the atmospheric pressure:

Let's also convert the initial and final temperature of the tire into Kelvin:

We know that the volume of the tire remains the same, so we can use the fact that the ratio between pressure and temperature of the tire remains constant:

which can be rewritten as

from which we can find the value of the final pressure, p2:

And converted back into PSI,

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.