Concept explainers
The work done in boring the hole.
Answer to Problem 25PP
The work done for boring the hole is
Explanation of Solution
Given:
A drill bores a small hole in a 0.40-kg block of aluminum which increases its temperature by
Formula Used:
According to First Law of
Where,
Q is the heat supplied to the object
W is the work done by the object.
The thermal energy is given by,
Here, m represents the mass of the object,C represents specific heat of the object and
Calculation:
Here, work is done on the object which is the aluminum block. The work done by the block is given by,
Also, there is no external source of heat energy. Thus,
Now, the thermal energy for the aluminum block of mass
Thus, based on (1), the thermal energy is given by,
And, the work done by the drill is,
Conclusion:
Therefore, the work done by the drill to bore the hole is 1.8 kJ.
Chapter 12 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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