Find the workdone in lifting a stone of mass `10kg` and specific gravity `3` from the bed of a lake to a height of `6m` in water

A uniform rod of length 2.0 m specific gravity 0.5 and mass 2 kg is hinged at one end to the bottom of a tank of water (specific gravity = 10) filled upto a height o f 1.0 m as shown in figure. Taking the case theta =- 0^(@) the force exerted by the hings on the rod is (g = 10 m//s^(2))

The liquids shown in figure in the two arms are mercury (specific gravity =13.6) and water. If the difference of heights of the mercury columns is 2 cm, find the height of the water column. ,

The liquids shown in figure in the two arms are mercury (specific gravity =13.6) and water. If the difference of heights of the mercury columns is 2 cm, find the height of the water column. ,

A body of mass 50 kg and specific gravity force is to be lifted using a rope of breaking strength of 60 kg wt. The acceleration with which it can be pulled up in least interval of time

A beaker containing water is kept on a spring scale. The mass of water and beaker is 5 kg . A block of mass 2 kg and specific gravity 10 is suspended by means of thread from a spring balance as shown. The readings of scales S_(1) " and " S_(2) are respectively Take, g=10 ms^(-2)

Find the workdone to move an earth satellite of mass m from a circular orbit of radius 2R to one of radius 3R.

Find the percentage decrease in the acceleration due to gravity when a body is take from the surface of earth to a height of 32 km from its surface. ["Take" R_(e )=6.4xx10^(6)m]

Find the percentage decrease in the acceleration due to gravity when a body is taken from the surface of earth of a height of 64 km from its surface [ Take R_(e) = 6.4 xx10^(6) m ]

The power (P) of an engine lifting a mass of 100 kg up to a height of 10 m in 1 min is