Question

What is gauge pressure and absolute pressure?

Answer 1

Gauge pressure: The amount by which the pressure measured in a fluid exceeds that of the atmosphere.

Absolute pressure: absolute is zero - referenced against a perfect vacuum , so it is equal to gauge pressure plus atmospheris pressure.

I hope this answer is right

Answer 2

Answer:

Absolute pressure :

Absolute pressure is a pressure that is relative to the zero pressure in the empty, air-free space of the universe. This reference pressure is the ideal or absolute vacuum. It is denoted with the subscript “abs”: Pabs.

Gauge pressure :

The gauge pressure is defined as the difference between an absolute pressure (Pabs) and the prevailing atmospheric pressure (Pamb). It is denoted with the subscript “e”: Pe and is calculated as follows: Pe = Pabs – Pamb.

Explanation: