When full, a gas cylinder registers a pressure of 2200 psig. After a few hours of use, the pressure gauge reads 550 psig. The cylinder is now how full?

Question

Quizplus · Accepted Answer

Assuming that pressure is directly proportional to the amount of gas remaining in the cylinder, we can use a simple inverse proportion to solve the problem.

If the pressure drops from 2200 psig to 550 psig, then the amount of gas remaining in the cylinder is reduced to 1/4th of its original amount.

Therefore, the cylinder is now one fourth full.

When Full, a Gas Cylinder Registers a Pressure of 2200