SAT2物理常用术语词汇整理（U）

　　为了方便广大考生更好的复习，和谐英语网综合整理了SAT2物理常用术语词汇，以供各位考生考试复习参考,希望对考生复习有所帮助。愿大家都能取得好成绩，更多有关留学考试的资讯与辅导资料敬请关注和谐英语网留学考试频道。

　　Uncertainty principle

　　A principle derived by Werner Heisenberg in 1927 that tells us that we can never know both the position and the momentum of a particle at any given time.

　　Uniform circular motion

　　The motion of a body in a circular path with constant speed.

　　Unit vector

　　A unit vector is a vector with length 1.

　　Universal gas constant

　　Represented by R = 8.31 J/mol · K, the universal gas constant fits into the ideal gas law so as to relate temperature to the average kinetic energy of gas molecules.

　　小编提醒：单词的记忆要靠长期的坚持，考生们一定要持之以恒，每天都拿出来看一看背一背，让这些词汇在大脑中形成长期记忆，这样就不会轻易地忘记背过的词汇了。

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