A ring is cut from a platinum tube `8.5 cm` internal and `8.7 cm` external diameter. It is supported horizontally from the pan of a balance, so that it comes in contact with the water in a glass vessel. If an extra `3.103 g.f.` is required to pull it away from water, the surface tension of water is

A ring is cut from a platinum tube 8.5 cm internal and 8.7 cm external diameter. It is supported horizontally from a pan of a balance so that it comes in contact with the water in a glass vessel. If an extra 3.97 gm-wt. is required to pull it away from water, the surface tension of water is

A thin metal ring of internal radius 8 cm and external radius 9 cm is supported horizontally from the pan of a balance so that it comes in contact with water in a glass vessel. If is found that an extrea weight of 7.48g is required to pull the ring out of water. The surface tension of water is (g=10m//s^(2))

A circle ring of radius 7cm is supported horizontally from the pan of a balance,so that it comes in contact with water in a glass vessel.The force required to detach it from the surface of water will be (surface tension of water will be 0.072N/m )

A ring is cut with inner radius 4.85cm and outer radius 4.95cm supported horizontally from one of the pans in a balance so that it comes in contact with the water in vessel.If surface tension of water is 70times10^(-3)N/m ,then the extra mass in the outer pan required to pull the ring away from water nearly in grams is? (g=10m/ s^(2) )

The force required to take away a flat circular plate of radius 4 cm from the surface of water is

A small piece of wire of length 4 cm is floating on the surface of water. If a force of 560 dynes in excess of itss apparent weight is requried to pull it up from the surface find the surface tension of water.

A platinum wire ring of radius 2.5 cm floats horizontally on the surface of water . A vertically force of 0.022 N is required to detach the ring from the surface of water . Then surface tension of water is

The length of needle foating on the surface of water is 1.5 cm the force in addition to its weight required to lift the needle from water surface will be (surface tension of water =7.5N//cm )

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

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