The fundamental differential equation for the pressure p at any point in a fluid of density ρ under forces (X, Y, Z) per unit mass is given by:

'The rate of increase of pressure in a vertically downward direction in a static fluid is equal to the weight density of the fluid at that point' is stated by:

A piece of ice is dropped into a vessel containing kerosene oil. When the ice melts completely, the level of kerosene in the vessel will: