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SAT2物理常用术语词汇整理(W)

2011-12-05 18:34

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作者:

  为了方便广大考生更好的复习,新东方网综合整理了SAT2物理常用术语词汇,以供各位考生考试复习参考,希望对考生复习有所帮助。愿大家都能取得好成绩,更多有关留学考试的资讯与辅导资料敬请关注新东方网留学考试频道。

  Wave

  A system with many parts in periodic, or repetitive, motion. The oscillations in one part cause vibrations in nearby parts.

  Wave speed

  The speed at which a wave crest or trough propagates. Note that this is not the speed at which the actual medium (like the stretched string or the air particles) moves.

  Wavelength

  The distance between successive wave crests, or troughs. Wavelength is measured in meters and is related to frequency and wave speed by = v/f.

  Weak nuclear force

  The force involved in beta decay that changes a proton to a neutron and releases an electron and a neutrino.

  Weber

  The unit of magnetic flux, equal to one T · m2.

  Weight

  The gravitational force exerted on a given mass.

  Weightlessness

  The experience of being in free fall. If you are in a satellite, elevator, or other free-falling object, then you have a weight of zero Newtons relative to that object.

  Work

  Done when energy is transferred by a force. The work done by a force F in displacing an object by s is W = F · s.

  Work function

  The amount of energy that metal must absorb before it can release a photoelectron from the metal.

  Work-energy theorem

  States that the net work done on an object is equal to the object’s change in kinetic energy.

  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。

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