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SAT2物理词汇术语整理9

2019-09-30 16:27:55来源:网络

  为了帮助大家高效备考SAT,新东方在线SAT频道为大家带来SAT2物理词汇术语整理9,希望对大家SAT备考有所帮助。更多精彩尽请关注新东方在线SAT频道!

  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.

  以上就是关于“SAT2物理词汇术语整理9”的内容,更多精彩内容,请关注SAT频道!

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