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7. 一鐘擺為黃銅製品,設計時是要使它在20℃時能準確計時。若該鐘在0℃時操作,則每小時約略會誤差幾秒?(黃銅的體膨脹係數為1.9×10-5℃-1) (A)0.46 (B)0.54(C)0.68 (D
問題詳情
7. 一鐘擺為黃銅製品,設計時是要使它在20℃時能準確計時。若該鐘在0℃時操作,則每小時約略會誤差幾秒?(黃銅的體膨脹係數為1.9×10-5℃-1)
(A)0.46
(B)0.54
(C)0.68
(D)0.76。
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