The radii of two drops are in the ratio of 3 : 2, their terminal velocities are in the ratio

Motion of a liquid in a tube is best described by

From the following figures, the correct observation is

If for gas, R/C_v =0.67, this gas is made up of molecules which are 

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

Water from a tap emerges vertically downwards with an initial speed of 1.0 ms^-1 .  The cross-sectional area of the tap is 10^-4 m².  Assume that the pressure is constant throughout the stream of water, and that the flow is steady.  The cross-sectional area of the stream 0.15 m below the tap is

Which one is not a dimensional number ?

A drop of water of volume 0.05 cm³  is pressed between two glass plates, as a consequence of which spreads and occupies an area of 40 cm² .  If the surface tension of water is 70 dyne/cm, then the normal force required to separate out the two glass plates will be :

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

Liquid rises to a height of 2 cm in a capillary tube.  The angle of contact between solid and liquid is zero.  The tube is depressed more now so that the tip of the capillary tube is only 1 cm above the liquid, the apparent angle of contact between solid and liquid is