Question

Can water be made to boil in a paper cup without the paper being burnt?

Answer 1

Take some water in a paper cup and heat it. It is observed that it is possible to boil water without burning the paper cup. This is due to the reason that the heat given by the flame is quickly transferred from the paper cup to the water. As a result, the temperature of the paper does not reach the ignition temperature and hence is not burned. The heat gained by water raises its temperature and finally, it starts boiling.