n small drops of radius r, combine to form a bigger drop of the radius R.  If the energy evolved provides K.E to the drop then the speed of the drop will be (density of drop = d and surface tension of liquid = T)

A jar is filled with two non-mixing liquids 1 and 2 having densities ρ₁ and ρ₂ respectively.

A solid ball, made of a material of density ρ₃ , is dropped in the jar.  It comes to equilibrium in the position shown in the figure.  Which of the following is true for ρ₁ and ρ₂ and ρ₃ ?

A man is sitting in a boat, which is floating on a pond.  If the man drinks some water from the pond, the level of water in the pond

There is a small hole in a hollow sphere.  The water enters in it when it is taken to a depth of 40 cm under water.  The surface tension of water is The diameter of hole is :

Water is flowing continuously  from a tap having an internal diameter 8×10^-3 m.  The water velocity as it leaves the tap is 0.4 ms^-1. The diameter of the water stream at a distance 2 × 10^-1 m below the tap is close to

Two capillaries of some materials are dipped into a liquid.  If the height of liquid risen in them are 2.2 cm and 6.6 cm then the ratio of their radii is

A steel ball is dropped in oil, then

Which one is not a dimensional number ?

A 15 cm x 6 cm x 0.1 cm slide suspended with its longest side vertical.  10% part of this slide is dipped into the water.  In this state its apparent weight is equal to its real weight.  The surface tension of water will be :

The potential energy possessed by a soap bubble, having surface tension equal to 0.04 Nm^-1 of diameter 1 cm, is