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 pure water in a glass vessel. If it is found that an extra weight of 7.48 g is required to pull the ring out of pure water. The surface tension of water is[Angle of contact of glass-pure water is 0∘](g=10 m/s2)

A thin metal ring of internal radius 8 cm and external radius 9 cm is

1.	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 pure water in a glass vessel. If it is found that an extra weight of 7.48 g is required to pull the ring out of pure water. The surface tension of water is[Angle of contact of glass-pure water is 0∘](g=10 m/s2)
Answer» 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 pure water in a glass vessel. If it is found that an extra weight of $7.48 g$ is required to pull the ring out of pure water. The surface tension of water is [Angle of contact of glass-pure water is $0^{\circ}$ ] ( $g = 10 {m/s}^{2}$ )

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