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

A ring of radius 0.75 cm is floating on the surface of water . If surface tension of water is 0.07N//m , then the force required to lift the ring from the surface of water will be

Eight droplets of water, each of radius 0.2 mm, coalesce into a single drop . Find the change in total surface energy. (Surface tension of water = 0.072 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 0.075 N//m .

Twenty seven droplets of water, each of radius 0.1 mm coalesce into a single drop. Find the change in surface energy. Surface tension of water is 0.072 N//m .

A wooden stick 2m long is floating on the surface of water. The surface tension of water 0.07 N/m. By putting soap solution on one side of the sticks the surface tension is reduced to 0.06 N/m. The net force on the stick will be

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 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)

Twenty seven droplets of water , each of radius 1.1 mm coalesce into a single drop .Find the change in surface energy. Surface tension of water is 0.072 N/m.