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Question
Figure H-1
When an iron ring is heated, the hole becomes
1) smaller,
2) larger,
3) neither smaller nor larger,
which follows from the fact that
4) expansion takes place inward toward the center of the ring as well as outward.
5) expansion takes place in all directions.
6) the surrounding air and the iron expand at different rates.
Answer
This answer is hidden. It contains 3 characters.
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