本题目来源于试卷: 1st Law of Thermal Dynamics，类别为 美国物理杯赛(Physics Bowl)
[单选题]
03.28: When gas escapep: u(9l9jgh -j nlpqw3s fromv5lg fzq f,v,+ zoltthg 7u46x:n9j9w a pressurized cylinder, the stream of gas feels cool. This6 t9vxzlg qf foj9w7t4 l+n vh:uz,5,g is 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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