本题目来源于试卷: Physics Unit14: Heat，类别为 通用国际物理
[单选题]
An aluminum kettle (mass 1000w4,npz r,n g4zaxr(9)b ,umyc g5au1ny3kk) -5 ymri45 fhnun z, $c = 0.22 \; kcal/kg \cdot ^{\circ}C$) holds 400 g of pure water at $20 \; ^{\circ}C$. The kettle is placed on a 1000 W electric burner and heated to boiling. Assume that all the heat from the burner heats the kettle and its contents, and that a negligible amount of water evaporates before boiling begins. Calculate the amount of time required to bring the water to boil.
A. $3.5 \; min$
B. $4.0 \; min$
C. $7.3 \; min$
D. $8.1 \; min$
参考答案: A
本题详细解析:
暂无
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