Assertion :The contact angle between water and glass is acute.
Reason :The surface of water in the capillary is convex .

When a glass capillary tube of radius 0.015 cm is dipped in water, the water rises to a height of 15 cm within it. Assuming contact angle between water and glass to be 0°, the surface tension of water.is [pwaler = 1000 kg m^(-3) , g = 9.81 m s^^(-2) ]

Assertion : Colours can be seen in thin layers of oil on the surface of water. Reason : White light is composed of several colours.

Assertion : If a convex lens of glass is immersed in water its power decreases. Reason : In water it behaves as a convex lens.

A capillary tube of the radius r is immersed in water and water rise in it to a height H. Mass of water in the capillary tube is m. If the capillary of radius 2r is taken and dipped in water, the mass of water that will rise in the capillary tube will be

A liquid of density rho and surface tension sigma rises in a capillary tube of diameter d. Angle of contact between the tube and liquid is zero. The weight of the liquid in the capillary tube is:

A capillary tube of radius r is immersed in water and water rises in to a height h. The mass of water in the capillary tube is 5g. Another capillary tube of radius 2 r is immersed in water. The mass of water that will rise in this tube is

Assertion : Brilliant colours are seen in thin layer of oil on the surface of water . Reason : White light is composed of several colours .

The contact angle between pure water and pure sliver is 90^@ If a capillary tube made of silver is dipped at one end in pure water, will the water rise in the capillary?

A vertical capillary is brought in contact with the water surface (surface tension = T). The radius of the capillary is r and the contact angle theta = 0^(@) . The increase in potential energy of the water (density =rho ) is