本题目来源于试卷: Physics Unit14: Heat，类别为 国际高中通用物理
[单选题]
An aluminum kettle (ma-nba 0ji5)yxaqz q.6is+q2hyo .nua tl)tlg 37s 1000 g, $c = 0.22 \; kcal/kg \cdot ^{\circ}C$) 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
| 
