Question

Take some pieces of papers of leaf size and make them waterproof. Put half in the hot water and put half in the cold water do all the pieces remains waterproof

Answer 1

No.

Explanation:

No, all the pieces of paper did not remains waterproof because expansion of paper occur due to high temperature of hot water. We know that materials expand when they experience high temperature and contract when they observe cold temperature. So the pieces of paper remains waterproof which were put in cold water while those were not waterproof which were put in hot water.