Physics Mechanical Properties of Fluids

An incompressible liquid flows through a horizontal tube as shown in the following figure. The velocity v of the fluid is

A point mass m is placed at a distance 2R from the centre of the shell of mass M and radius R. The gravitational force exerted by shell on the point mass is

Two capillary tube of radii 0.3 cm and 0.4 cm are dipped in the same liquid. The ratio of respective heights through which liquid will rise, is

Which of the following material is most suitable for making cooking utensil?

Two rain drops reach earth from clouds with different terminal velocities having ratio 9 : 4. Then the ratio of their volumes is

If work done in increasing the size of rectangular soap film with dimensions 8 cm * 3.75 cm to 10 cm * 6 cm is 2 * 10^–4 J. The surface tension of film in newton per meter is

Consider the two statements:

Statement-1: A capillary tube is first dipped in hot water and then dipped in cold water. The rise is higher in hot water.

Statement-2: Capillary tube is first dipped in cold water and then dipped in hot water. The rise is higher in cold water.

Water has been filled in a vertical capillary tube upto the top after closing its lower end by a finger Consider radius of capillary r = 1 mm, surface tension is 70 dyne/cm and g = 980 cm/sec2. Which of the option is correct when finger is removed?

The force required to stretch a steel wire of cross section 4 cm2 to 1.02 times its length would be (Y = 2*10¹¹ N m^–2)

Mercury does not wet glass because