本题目来源于试卷: Particulate Nature of Matter B.1 Thermal Energy Transfers，类别为 IB物理学
[单选题]
Water of mass m at an initial al nv6bapi;s/u8y ah;gv ((c)teh* +ch* xn,ylmmperature of $20^{\circ}C$ oC is provided with thermal energy at a rate P. Its temperature rises to $30^{\circ}C$ in time t.
The rate of energy transfer is doubled and the mass of the water is halved. What is the final temperature, in time t, if the initial temperature is again $20^{\circ}C$?
A. 30$^{\circ}C$
B. 40$^{\circ}C$
C. 60$^{\circ}C$
D. 80$^{\circ}C$
参考答案: C
本题详细解析:
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