People in the pioneering days placed hot potatoes in their pockets on cold winter days to keep their hands warm. Assuming that a potato is mostly water, Andrew calculates 24,000 calories of heat are released by a 350-g potato that cools from
To identify: The person that has done the heat released calculation correctly
Answer to Problem 53A
The heat released calculation done by both the persons are correct as the heat released is approximately equal to
Explanation of Solution
Given:
The mass of potato is
Consider the potato is cooled from
Formula used.
The expression for heat transfer is,
Here,
Calculation:
Consider the specific heat as
The change in temperature is,
The amount of heat released a potato is,
The amount of heat released by a potato is approximately
Conclusion:
Thus, the heat released calculation of both the persons are correct
Chapter 21 Solutions
Conceptual Physics: The High School Physics Program
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