Concept explainers
Suppose that a metal bar 1 m long expands 0.5 cm when it is heated. How much would it expand if it were 100 m long?
Expansion in metal bar.
Answer to Problem 64A
The expansion in metal bar is 50 cm.
Explanation of Solution
Given:
Initial length of metal bar is 1 m.
Initial expansion of metal bar is 0.5 cm.
New length of metal bar is 100 m
Calculation:
Since the material of metal bar is same and
As for 1 m long metal bar expansion is 0.5 cm
So, for 100 m long metal bar expansion is
That is the new expansion in 100 m long metal bar is 50 cm.
Conclusion:
Therefore, the expansion in 100 m long metal bar is 50 cm.
Chapter 21 Solutions
Conceptual Physics: The High School Physics Program
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