Question

watermelon taken out from fridge will be cool for a long time why?

Answer 1

Water melon has lot of water in it . You may know , water is an insulater(gets hot or cold slowly) , so it will take water long time to get warm . So water keeps water melon cool for long time .

Answer 2

Watermelon contains 92% of water. Since the specific heat capacity of water is very high 4200 J/(kg K), the specific heat capacity of watermelon is also high. The higher the specific heat of an object the more energy it requires to increase its temperature. So it takes a longer time to heat up, if the surroundings are supplying heat energy at a constant rate. That is why watermelon remains cool for a long time after removing it from a fridge on a hot day.

hopes this helps!!!!!!!!!!!!!!!!