A hollow shaft is found to be stronger than a solid shaft made of same equal material.

Assertion : A hollow shaft is found to be stronger than a solid shaft made of same material. Reason : The torque required to produce a given twist in hollow cylinder is greater than that required to twist a solid cylinder of same size and material.

A hollow sphere and a solid sphere of equal radii and of same material are heated to raise their temperature by equal amounts. How will the change in their volume expansion be related?

Two spheres, one solid and other hollow are kept in atmosphere at same temperature. They are made of same material and their radii are also same. Which sphere will cool at a faster rate initially?

We have a hollow sphere and a solid sphere equal radii and of the same material. They are heated to raise their temperature be equal amounts. How will the cange in their volumes, due to volume expansions, be related? Consider two cases (i) hollow sphere is filled with air, (ii) there is vaccum inside the hollow sphere.

There are two electric poles, one is with hollow structure and other with a solid structure. They are made from the same and equal amount of material. Which electric pole do you perfer? Why.

Two rods, one hollow and the other solid, made of the same material have the same length of 20 cm and radius of 2 cm. When their temperature is increased through the same amount of 50^(@)C , their expansion ratio Eh : Es will be :

A solid sphere of radius R is placed on a cube of side 2R. Both are made of same material. Find the distance of their centre of mass fro the interface.