SAT2考试是SAT subject test的通常说法，SAT2考试有别于SAT1，它是一种专项考试，考察学生某一科目的能力。下面无忧小编为大家介绍以字母U开头的SAT2物理考试高频词汇整理。

　　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。

　　U

　　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.

　　以上便是SAT2物理考试高频词汇整理，接下来无忧小编还会连续为大家介绍其它SAT2物理词汇，希望大家持续关注。无忧小编祝大家都能取得优异的SAT2物理考试成绩!