The area of base of a cylindrical vessel is 300 cm ². Water (density = 1000 kg m ^-3) is poured into it up to a depth of 6 cm. Calculate (a) the pressure and (b) the thrust of water on the base. (g = 10 m s^-2).

(a) Calculate the height of a water column which will exert on it's base the same pressure as the 70 cm column of mercury. Density of mercury is 13.6 g cm^-3.

(b) Will the height of the water column in part (a) change if the cross section of the water column is made wider ?

A simple U tube contains mercury to the same level in both of it's arms. If water is poured to a height of 13.6 cm in one arm, how much will be the rise in mercury level in the other arm ?

Given: density of mercury = 13.6 x 10³ kg m^-3 and density of water = 10³ kg m^-3

In a hydraulic machine, a force of 2 N is applied on the piston of area of cross section 10 cm ². What force is obtained on it's piston of area of cross section 100 cm ²?