Water flows through a tube as shown in the given figure. Find the difference in mercury level, if the speed of flow of water at point A is `2 m//s` and at point B is `5 m//s`. (`g=9.8m//s^2`)

Calculate the work done to take an object of mass 20 kg to a height of 10 m. (g = 9.8 m/s2)

A water tank has a hole at a distance x m from free water surface. If the radius of the hole is 2 mm and velocity of efflux of water is 11 m//s. Find V. (g = 9.8 m//s^2)

The speed of water is 2m//s through a pipe of internal diameter 10 cm. What should be the internal diameter of nozzle of the pipe if the speed of water at nozzle is 4m//s ?

A capillary tube of radius 5 xx 10^-4 m is immersed in a beaker filled with mercury. The mercury level inside the tube is found to be 8 xx 10^-3 m below the level of reservoir. Determine the angle of contact between mercury and glass. Surface tension of mercury is 0.465 N//m and its density is 13.6 xx 10^3 kg//m^3 . (g= 9.8 m//s^2 )

A pipe GB is fitted with two pipes C and D as shown in the figure. The pipe has area A =24 m^(2) at G and velocity of water at G is 10 m/s, and at C is 6 m/s. The velocity of water at D is

A body is released from the top of a tower of height 50 m. Find the velocity with which the body hits the ground. (g=9.8 m/s^2)

Doors of a dam are 20 m below the surface of water in the dam. If one door is opened, what will be the speed of the water that flows out of the door?( g=9.8m//s^2 )