If a system is maintained at a pressure of 2 psi of vacuum, what is the pressure in psia (lbs per square inch absolute)

The absolute pressure of the system is 12.7 psia.

Explanation:

Let suppose that system works at an atmospheric pressure of 14.7 psia, the absolute pressure is equal to the atmospheric pressure minus vaccum pressure, that is:

Where:

- Absolute pressure, measured in pounds per square inch.

- Atmospheric pressure, measured in pounds per square inch.

- Vacuum pressure, measured in pounds per square inch.

Given that and , the absolute pressure of the system is:

The absolute pressure of the system is 12.7 psia.

prolly a beacuse the momentuem the car has increases while going down hill