Avacuum gage connected to a chamber reads 39 kpa at a location where the atmospheric pressure is 92 kpa. determine the absolute pressure in the chamber?

53 kPa

Explanation:

Absolute pressure is a pressure value referred to absolute zero or vacuum. This value indicates the total pressure to which a body or system (the chamber in this situation) is subjected, considering the total pressure acting on it.

In this sense, the equation that will be useful in this case is:

 (1)

Where:

is the atmospheric pressure

is the vacuum pressure

is the absolute pressure

Isolating  from (1):

 (2)

 (3)

Finally:

This is the absolute pressure in the chamber

true tan speed = ang vel x radius