SAT2物理考试常用术语(1)

济南sat培训学校 济南新航道,sat2000分班 sat真题模考班 sat赴港考试团 一对一辅导 免费入学测试http://jn.xhd.cn/专业英语口语学习网站

　　济南新航道为考生指导SAT考试并且为需要的学子提供SAT培训。SAT备考尤其重要，下面我们为考生整理了一些关于SAT2物理常用术语，希望帮助考生备考SAT提供一些帮助和借鉴。

 

 

 

　　The following list defines all of the bold-faced words you encountered as you read this book.

 

 

 

　　A

 

 

 

　　Absolute zero

 

 

 

　　The lowest theoretical temperature a material can have, where the molecules that make up the material have no kinetic energy. Absolute zero is reached at 0 K or –273o C.

 

 

 

　　Acceleration

 

 

 

　　A vector quantity defined as the rate of change of the velocity vector with time.

 

 

 

　　Activity

 

 

 

　　In radioactive substances, the number of nuclei that decay per second. Activity, A, will be larger in large samples of radioactive material, since there will be more nuclei.

 

 

 

　　Alpha decay

 

 

 

　　A form of radioactive decay where a heavy element emits an alpha particle and some energy, thus transforming into a lighter, more stable, element.

 

 

 

　　Alpha particle

 

 

 

　　A particle, which consists of two protons and two neutrons. It is identical to the nucleus of a helium atom and is ejected by heavy particles undergoing alpha decay.

 

 

 

　　Amplitude

 

 

 

　　In reference to oscillation, amplitude is the maximum displacement of the oscillator from its equilibrium position. Amplitude tells how far an oscillator is swinging back and forth. In periodic motion, amplitude is the maximum displacement in each cycle of a system

 

in periodic motion. The precise definition of amplitude depends on the particular situation: in the case of a stretched string it would be measured in meters, whereas for sound waves it would be measured in units of pressure.

 

 

 

　　Angle of incidence

 

 

 

　　When a light ray strikes a surface, the angle of incidence is the angle between the incident ray and the normal.

 

 

 

　　Angle of reflection

 

 

 

　　The angle between a reflected ray and the normal.

 

 

 

　　Angle of refraction

 

 

 

　　The angle between a refracted ray and the line normal to the surface.

 

 

 

　　上面就是我们列举的SAT2物理常用术语，大家在备考SAT一定要对词汇方面有更多更加详细的准备。最后，提醒大家，在备考时一定要自己多查看一些资料以及相关讯息，这样考试的时候就能轻松应对。祝各位考生考出好成绩。