Should the handle and bristles of tooth brush be made of same material? Explain.

Which objects are made of one material ?

Talk to an electician. Look at the handles of his tools. Are the handles made of the same materials ? If not why ?

Magnesia is a refractory material.Explain.

A hollow cylinder of inner radius 3 cm and outer radius 5 cm and a solid cylinder of radius 2 cm are subjected to the same force. If they are made of same material and of same length, then the ratio of their elongations is

Which of the following circular rods, (given radius r and length l) each made of the same material and whose ends are maintained at the same temperature will conduct most heat?

Name any five objects which are made up of only one material.

The handles of utensils are made up of