問題詳情
17. ( )如下圖,設 a、b 為相同材質的兩個金屬球,b 球的質量是 a 球的兩倍。a 球溫度是 29℃,b 球溫度是 17℃,槽中水溫是 21℃。現在將兩個金屬球都放入水中,然後等待它們達到熱平衡。假如在過程中熱量沒有流失,則最後水的溫度應該是幾℃?
(A) 29
(B) 20
(C) 17
(D) 21。

(A) 29
(B) 20
(C) 17
(D) 21。
參考答案
答案:D
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)
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