Mechanical Prop...

Water enters a horizontal pipe of non uniform cross section with a velocity of $$0.4$$ $$m s ^ { - 1 }$$ and leaves the other end with a velocity of $$0.6$$ $$m s ^ { - 1 }$$ .pressure of water at the first end is $$1500$$ $$N m ^ { - 2 }$$,then pressure at the other end is

Velocity of efflux 

A drop of liquid having radius 2 cm has a terminal velocity 20 cm/sec, the terminal velocity of a drop of 1 mm radius will be :

Eight equal drops of water each if radius $$r=2\ mm$$ are falling through air with a terminal velocity of $$16\ cm/s$$. The eight drops combine to form a big drop. Calculate the terminal velocity of big drop 

A cylinder with a movable piston contains air under a pressure $${ p }_{ 1 }$$ and a soap bubble of radius 'r' The which the air should be compressed by slowly pushing the pistc size by half will be: ( The surface tension is S, and temperature T is malntalned constant)

A beaker containing water is placed on the platform of a spring balance. The balance reads $$1.5kg$$. A stone of mass $$0.5kg$$ and density $$500kg/{m}^{3}$$ is completely immersed in water without touching the walls of the beaker. What will be the balance reading now?

The volume of an air bubble increases by $$x$$% as it raises from the bottom of a water lake to its surface. If the water barometer reads $$H$$. The depth of the lake is :

A solid cone of height $$H$$ and base radius $$H/2$$ floats in a liquid of density $$\rho$$. It is hanging from the ceiling with the help of a string. The force by the fluid on the curved surface of the cone is ($${P}_{0}=$$ atmospheric pressure)

Water is poured from a height of 10 m into an empty barrel at the rate of 1 litre per second. If the weight of the barrel is 10 kg, the weight indicated at time t = 60 s will be 

The radius of one arm of a hydraulic lift is three times the radius of the other arm. What force should be applied on the narrow arm so as to lift $$50kg$$ at the wider arm?