The formula to calculate the Vacuum Pressure (Pvac) is:
\[ P_{vac} = P_L - P_A \]
Where:
Let's say the local atmospheric pressure is 101325 Pa and the absolute pressure is 50000 Pa. Using the formula:
\[ P_{vac} = 101325 - 50000 \]
We get:
\[ P_{vac} = 51325 \text{ Pa} \]
So, the vacuum pressure is 51325 Pa.