1. The problem statement, all variables and given/known data Case 1: Which will boiling faster the container having steel ball dipped in it or container having only water? Case 2: Which one will attain thermal equilibrium faster? Consider balls are just in middle of the container. every condition of each the cases have same volume of water 2. Relevant equations Q=mc*dT 3. The attempt at a solution It is different than boiling stone; As we are heating simultaneously water and the steel ball. In 1st case; as volume of water is same that means container with steel ball would require extra energy that means it will boil late. In 2nd case; we could apply transient head transfer but how could we compare "h" for both the cases.