Calculation Method Of Pressure Cooker

When the valve is jacked up by the internal air pressure, according to Newton's first theorem, the external atmospheric pressure and the gravity of the valve itself are the balance force with the internal atmospheric pressure.

Then: P. (External atmospheric pressure) × S (cross-sectional area of valve)+m (mass of valve) g (9.807,665m/s * s)=P '(internal air pressure of pressure cooker) × S

1. After conversion, m=[(P '- P.) * S]/g (valve mass is calculated with known pressure)

2. P '=[(P. * S+mg)]/S (know the valve mass and calculate the internal pressure)

These two formulas are sufficient for physics examination. (Usually, only these two exams are taken.). It is a big test site.