What is the radius of a steel sphere that wil float on water with exactly half the sphere submerged ? Density of steel is `7.9 xx 10^(3)kg//m^(3)` and surface tension of water is `7 xx 10^(-2)N`.

What would be the greatest length of a steel wire, which when fixed at one end can hang freely without breaking? (Density of steel = 7800 kg//m^(3) , Breaking stress form steel = 7.8 xx 10^(8) N//m^(2) , g = 10 m//s^(2) )

A liquid of density 850 kg//m^3 has an unknown surface tension . However , it is observed that if rises three times high in a capillary tube as compared to pure water . If the contact angles for both are same , then the surface tension of liquid is (Surface tension of water = 7.0xx10^(-2) N//m )

A liquid of density 850 kg//m^3 has an unknown surface tension . However , it is observed that if rises three times high in a capillary tube as compared to pure water . If the contact angles for both are same , then the surface tension of liquid is (Surface tension of water = 7.0xx10^(-2) N//m )

A hollow sphere has a small hole in it. On lowering the sphere in a tank of water, it is observed that water enters into the hollow sphere at a depth of 40 cm below the surface. Surface tension of water is 7 xx 10^(-2) N//m . The diameter of the hole is

A hollow sphere has a small hole in it. On lowering the sphere in a tank of water, it is observed that water enters into the hollow sphere at a depth of 40 cm below the surface. Surface tension of water is 7 xx 10^(-2) N//m . The diameter of the hole is

A hollow sphere has a small hole in it. On lowering the sphere in a tank of water, it is observed that water enters into the hollow sphere at a depth of 40 cm below the surface. Surface tension of water is 7 xx 10 ^(-2) N//m . The diameter of the hole is approximately :

A hollow sphere has a small hole in it. On lowering the sphere in a tank of water, it is observed that water enters into the hollow sphere at a depth of 40 cm below the surface. Surface tension of water is 7 xx 10^(-2) N//m . The diameter of the hole is