If the atmospheric pressure is $P_a$,then the pressure $P$ at depth $h$ below the surface of a liquid of density $\rho$ open to the atmosphere is:

Why are two holes made to empty an oil tin?

$A$ barometer kept in an elevator reads $76 \, cm$ when the elevator is accelerating upwards. The most likely pressure inside the elevator (in $cm$ of $Hg$) is ........

$A$ barometer tube,containing mercury,is lowered in a vessel containing mercury until only $50 \, cm$ of the tube is above the level of mercury in the vessel. If the atmospheric pressure is $75 \, cm$ of mercury,what is the pressure at the top of the tube?

Two copper vessels $A$ and $B$ have the same base area but different shapes. Vessel $A$ requires twice the volume of water as vessel $B$ to fill up to a particular common height. Which of the following statements is correct?

What does it mean when the height of a barometer is rising?