A solid sphere hung at the lower end of a wier is suspended from a fixed point so as to give an elongation of `0.4mm`. When the first solid sphere is replaced by another one made of same material but twice the radius, the new elongation is

When a metal sphere is suspended at the end of a metal wire its extension is 0.4mm. If another metal sphere of the same material with its radius half as the previous is suspended then extension would be

When a metal sphere is suspended at the end of a metal wire, its extension is 0.4 mm. If another metal sphere of the same material with its radius is half of the previous, is suspended then extension would be

A cylindrical rod with one end in a steam chamber and the other end in ice results in melting of 0.1 g of ice per second. If the rod is replaced by another with half the length and double the radius of the first and if the thermal conductivity of material of second rod is 1/4 that of first, the rate at which ice melts in g//s will be

A cylindrical rod with one end in a steam chamber and the other end in ice results in melting of 0.1 g of ice per second. If the rod is replaced by another with half the length and double the radius of the first and if the thermal conductivity of material of second rod is 1/4 that of first, the rate at which ice melts in g//s will be

A wire of length L and radius r is fixed at one end. When a stretching force F is applied at free end, the elongation in the wire is l . When another wire of same material but of length 2L and radius 2r , also fixed at one end is stretched by a force 2F applied at free end, then elongation in the second wire will be

Keeping one end of a wire of length L and radius r fixed, a force F is applied at the other end to elongate it by l. Another wire made of same material but of length 2L and radius 2r is stretched by a force 2F. Its increase in length will be

A cylindrical rod with one end in steam and other end in ice results in melting of 0.1 g of ice per second If the rod is replaced by another with half the length, double the radius of first and if the conductivity of material of second is 1/4 of first, the rate at which ice melts is (in g/s)