The formula to calculate the Absolute Pressure (Pa) is:
\[ Pa = Pg + Pat \]
Where:
Absolute pressure is defined as the sum of the atmospheric pressure and gauge pressure. It is a measure of pressure relative to the absolute zero pressure in the vacuum of space.
Let's consider an example:
Using the formula to calculate the Absolute Pressure:
\[ Pa = 50000 + 101325 = 151325 \text{ Pa} \]
This means that the absolute pressure for this scenario is 151,325 Pa.