When the temperature is increased, the angle of contact of a liquid

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 ?

The radii of two soap bubbles are R₁ and R₂ .  If they coaleasce, the radius of curvature of the common surface will be :

A 20 cm long capillary tube is dipped in water.  The water rises up to 8 cm.  If the entire arrangement is put in a freely falling elevator the length of water column in the capillary tube will be

Bernoulli's equation is an example of conservation of

A U-tube of uniform cross-section is partially filled with a liquid I.  Another liquid II which does not mix with liquid I is poured into one side.  It is found that the liquid levels of the two sides of the tube are the same, while the level of liquid I has risen by 2 cm.  If the specific gravity of liquid I is 1.1, the specific gravity of liquid II must be

A steel ball is dropped in oil, then

A bubble is at the bottom of the lake of depth h.  As the bubble comes to sea level, its radius increases three times.  If atmospheric pressure is equal to l metre of water column, then h is equal to

A water fountain on the ground sprinkles water all around it.  If the speed of water coming out of the fountain is v, the total area around the fountain that gets wet is

A cylinder of height 20 m is completely filled with water.  The velocity of efflux of water (in ms^-1 ) through a small hole on the side wall of the cylinder near its bottom is