Thermal Propert...

A raft of wood (density 600 kg/m³) of mass 120 kg floats in water. How much weight can be put on the raft to make it “just sink”.

A unifor 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 = 1.0) filled upto a height of 1.0 m, as shown in Fig. 8.16. Taking, the case θ ≠ 0, the force exerted by hinge on the rod is (g = 10 m/s²)

1000 drops of water each of radius r, density ρ, surface tension S join together to form a single drop and the energy released raises temperature of the drop. If J is the Joule’s mechanical equivalent of heat, what is the rise in temperature?

A mercury drop of radius 1 cm is broken into 106 droplets of equal size. The work done is (S = 35 × 10^–2 N/m)

A spherical liquid drop of radius R is divided into eight equal droplets. If surface tension is T, then the work done in this process will be

n drops of a liquid, each with surface energy E, join to form a single drop.
Where S is surface tension and P is the atmospheric pressure.

Which graph represents the variation of surface tension with temperature over small temperatures ranges for water ?

A spherical ball is dropped in a long column of a viscous liquid. The speed (v) of the ball as a function of time (t) may be best represented by

A small spherical ball of steel falls through a viscous medium with terminal velocity V. If a ball of twice the radius of the first one but of the same mass is dropped through the same medium, it will fall with a terminal velocity (neglect buoyancy)

A cylindrical drum, open at the top, contains 15 litres of water. It drains out through a small opening at the bottom. 5 litres of water comes out in time t₁, the next 5 litres in further time t₂ and the last 5 litres in further time t3. Then