Two wire having same length and same radius and given same load. One made of steel and other copper. If Young's modules of elasticity is twice that of other then calculate the potential energy stored in copper and steel.

Two wires of same radius and legth are subjected to the same load . One wire is of steel an the other is of copper . If the young modulus of steel is twice that of copper find the ratio of elastic energy stored per unit volume in steel to that of copper .

Two solid sphere of the same mass and same radius, one solid and other hollow. Which one have greater moment of inertia about a diameter?

Two metalic wires of same length an d same cross - section but different Young modulus are pulled by same force . Which wire will be elangated more ?

The masses of two bodies are same. One is placed at the height of 10 m and the other is placed at the height of 20 m. Which one has more potential energy?

Assume the thermal conductivity of copper is 4 times that of brass.Two rods of copper and brass having the same length and cross section are joined end to end.The free and end of copper is at 0°C and the free end of brass is at 100°C.Calculate the temperature of the junctionof thw two rods at equilibirum.

. Two wires of the same radius and material have their lengths in the ratio 1 : 2. If these are stretched by the same force the strain produced in the two wires will be in the ratio

Two wire made of same material and ratio of their length is 1:2 and ratio of raidus is 2:1. If they are strecthed by same force calculate the ratio of increase in length.

Transverse wave of the same frequency are generated in two steel wires A and B.Diameter of A is twice that of B and tension is A is half that of B.The ratio of velocities of waves in A and B is

A wire of length L and radius r is fixed at one end and a force F applied to the other end produces an extension l. the extension produced in another wire of same material of length 2L and radius 2r by a force 2F is

Two spheres made of same meterial have radii in the ratio 1:2 both are the same temperature Ratio of heat radiation energy emitted per sec by them is