北京新航道为考生指导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.

 

　　E

 

　　Efficiency

 

　　For a heat engine, the ratio of work done by the engine to heat intake. Efficiency is never 100%.

 

　　Elastic collision

 

　　A collision in which both kinetic energy and momentum are conserved.

 

　　Electric generator

 

　　A device that converts mechanical energy to electrical energy by rotating a coil in a magnetic field; sometimes called a “dynamo.”

 

　　Electromagnetic induction

 

　　The property by which a charge moving in a magnetic field creates an electric field.

 

　　Electromagnetic spectrum

 

　　The spectrum containing all the different kinds of electromagnetic waves, ranging in wavelength and frequency.

 

　　Electromagnetic wave

 

　　A transverse traveling wave created by the oscillations of an electric field and a magnetic field. Electromagnetic waves travel at the speed of light, m/s. Examples include microwaves, X rays, and visible light.

 

　　Electron

 

　　A negatively charged particle that orbits the nucleus of the atom.

 

　　Electronvolt

 

　　A unit of measurement for energy on atomic levels. 1 eV = J.

 

　　Energy

 

　　A conserved scalar quantity associated with the state or condition of an object or system of objects. We can roughly define energy as the capacity for an object or system to do work. There are many different types of energy, such as kinetic energy, potential energy,

thermal energy, chemical energy, mechanical energy, and electrical energy.

 

　　Entropy

 

　　The disorder of a system.

 

　　Equilibrium

 

　　The state of a nonrotating object upon whom the net torque acting is zero.

 

　　Equilibrium position

 

　　The stable position of a system where the net force acting on the object is zero.

 

　　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。