作者jokewind (悔過)
看板NTU-K9
標題俗話說:「人不可以自大」
時間Mon Oct 6 23:18:46 2003
今天我學弟很誠懇地問我一個普物問題
結果我想說我普物還算罩得住
就算經過兩年一樣寶刀未老
在他面前臭屁起來
結果才第一題就摃歸了
可是我真得很懷疑
???????????????????這真得普物有教過嗎???????????????????
After measuring the speed of sound U several times
student concludes that the standard deviation of his measurements is σ=12m/s
Assume that the uncertainties are random
and that the experiments is not limited by systematic effects
and determine how many measurements would be required to give
a final uncertainty in the mean of ±2.0m/s.
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