本题目来源于试卷: 1 st law of Thermal Dynamics，类别为 美国物理杯赛(Physics Bowl)
[单选题]
03.28: When gas escapes2jiw4 ptu 3z6m,k8ewp cu0;: 79l b9-wu ,emdbeatmxd from a pressurized cylinder, the stream of gas feels cool. This is:,acldte9-9e 7xbmd w ;m0u ub because
A. work is being done at the expense of thermal energy
B. of the convection inside the cylinder
C. pressurized cylinders are good thermal insulators
D. the gas inside the cylinder is actually frozen
E. the moisture in the air condenses and cools
参考答案: A
本题详细解析:
暂无
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