下面是关于SAT2物理专业词汇中UV开头的单词小结，包括了一些非常重要的概念等。大家可以在备考自己的SAT2物理考试的时候，对此加以适当的参考和借鉴，这样就既可以记忆词汇，也可以复习知识点，一举两得。更多SAT备考资料请点击

　　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.

　　V

　　Vector

　　A vector quantity, or vector, is an object possessing, and fully described by, a magnitude and a direction. Graphically a vector is depicted as an arrow with its magnitude given by the length of the arrow and its direction given by where the arrow is pointing.

　　Velocity

　　A vector quantity defined as the rate of change of the displacement vector with time. It is to be contrasted with speed, which is a scalar quantity for which no direction is specified.

　　Vertex

　　The center of a mirror or lens.

　　Virtual image

　　An image created by a mirror or lens in such a way that light does not actually come from where the image appears to be.

　　以上就是为大家总结的是关于SAT2物理词汇方面的信息，都是以字母U,V打头的专业词汇，对于大家的备考有很大的帮助。SAT2物理考试需要大家在备考的时候记忆大量的专业词汇，这样才能更快更好的解答相关题目。

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