Class 7 Science Physics Heat
Which of the following methods would reduce the temperature of hot tea
(a)
Add more tea at the same temperature
(b)
Add water at the same temperature
(c)
Add water at temperature lower than the temperature of tea
(d)
Add water at temperature higher than the temperature of tea
Correct answer: (c) 
Solution: temperature of hot tea add water at temperature lower than the temperature of tea
Water is an  effective coolant,For a coolant a substance has to have a high specific heat capacity, meaning it can absorb a lot of heat. It also has to be nontoxic, or non-poisonous. It also needs to be fairly common, which would mean since it is readily available, the cost should be fairly low

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