A metal rod of length 0.5m expands to 0.535m when the temperature is increased from 25℃to 165℃.
The rate of expansion im mm/℃ is 0.25 mm/℃
If the temperature further rises 20℃ , find the length of the rod .
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2012-02-15 5:03 am
回答 (1)
2012-02-15 8:57 am
✔ 最佳答案
Check initial condition is valid or not:(165-25)℃ * 0.25 mm/℃ + 0.5m = 0.535m
Initial condition Valid.
If temperature further rises 20℃,new temperature is 185℃
The length of the rod:
(185-25)℃ * 0.25 mm/℃ + 0.5m = 0.54m
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