An iron bar is exactly one meter long at 15 degree celsius. A brass bar is 0.5mm shorter than the iron bar at 15 degree celsius. They are both heated in the same oven. At what temperature will they be the same length?
(the coefficient of linear expansion of brass is 19x10^-6/degree celsius,
the coefficient of linear expansion of iron is 12x10^-6/degree celsius)
thermal physics question
2010-04-21 5:29 am
回答 (1)
2010-04-21 7:28 am
✔ 最佳答案
Let T be the required temperatureIncrease in length of iron bar = 1 x 12 x 10^-6 x (T-15)
Increase in length of brass bar = (1- 0.0005) x 19x10^-6 x (T-15)
Hence, 1 x 12 x 10^-6 x (T-15) + 0.0005 = (1- 0.0005) x 19x10^-6 x (T-15)
solve for T
收錄日期: 2021-04-29 17:34:09
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