Hello.
If the hydrostatic pressure in the tank is 100hPa and the external pressure is 1013hPa, then in the mercury u-tube manometer the level of manometric liquid will be:
1013hPa - 100hPa = 913hPa
913hPa = -684.8mmHg ("-" because external pressure is higher) (?)
Am I right?
ChemBuddy | 
Chem Reddit | 
Topic: u-tube manometer; pressure (Read 910 times)