A square glass plate 4.5 cm long and 0.5 cm thick is suspended in a through containing water so that its length just touches the water surface, calculate the downward force due to surface tension acting on the plate. (Surface tension of water = 70 dyne/cm)

Calculate the radius of capillary tube if water rise to a height 4.5 cm . Surface tension of water is 72 dyne /cm .

A beaker of radius 10 cm is filled with water. Calculate the force of surface tension on any diametrical line on its surface. Surface tension of water is 0.075 N//m .

A beaker of radius 10 cm is filled with water.Calculate the force of surface tension on any diametrical line on its surface. Surface tension of water is 0.075N/m.

A drop of water placed between two parallel glass plates which are then pressed together unil the water film is 0.01 cm thick. If the area of water in contact with either plate is 10 cm^2 , then the force due to surface tension drawing the plates together is (S.T. of water is 75 dyne/ cm)

If the length of a needle floating on water is 2 cm then the additional force due to surface tension required to pull the needle out of water will be. S.T of water=7.0xx10^-2N//m)

A needle of length 6 cm can stay afloat on water. Find weight of the needle. (Surface tension of water 0.075 N//m )

An air bubble of radius 0.2 mm is situated just below the water surface. Calculate the guage pressure. Surface tension of water = 7.2 xx 10^(-2) N/m .

An air bubble of radius 0.2 mm is situated just below the water surface. Calculate the gauge pressure. Surface tension of water = 7.2 xx 10^-2 N//m .