A 1,790 W toaster, a 1,480 W electric frying pan, and a 60 W lamp are plugged into the same outlet in a 15 A, 120 V circuit. (Th
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Answer : The specific heat of unknown sample is,
Explanation :
In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.
where,
= specific heat of unknown sample = ?
= specific heat of water =
= specific heat of copper =
= mass of unknown sample = 72.0 g = 0.072 kg
= mass of water = 203 g = 0.203 kg
= mass of copper = 187 g = 0.187 kg
= final temperature of calorimeter =
= initial temperature of unknown sample =
= initial temperature of water and copper =
Now put all the given values in the above formula, we get
Therefore, the specific heat of unknown sample is,