新东方网>留学>SAT考试>SAT辅导>SAT物理>正文

SAT2物理常用术语词汇整理(S)

2011-12-05 18:31

来源:互联网

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。

  Scalar

  A quantity that possesses a magnitude but not a direction. Mass and length are common examples.

  Second Law of Thermodynamics

  There are a few versions of this law. One is that heat flows spontaneously from hot to cold, but not in the reverse direction. Another is that there is no such thing as a 100% efficient heat engine. A third states that the entropy, or disorder, of a system may increase but will never decrease spontaneously.

  Significant digits

  The number of digits that have been accurately measured. When combining several measurements in a formula, the resulting calculation can only have as many significant digits as the measurement that has the smallest number of significant digits.

  Simple harmonic oscillator

  An object that moves about a stable equilibrium point and experiences a restoring force that is directly proportional to the oscillator’s displacement.

  Sine

  In a right triangle, the sine of a given angle is the length of the side opposite the angle divided by the length of the hypotenuse.

  Snell’s Law

  Relates the angle of incidence to the angle of refraction: .

  Sound

  Waves carried by variations in air pressure. The speed of sound waves in air at room temperature and pressure is roughly 343 m/s.

  Specific heat

  The amount of heat of a material required to raise the temperature of either one kilogram or one gram of that material by one degree Celsius. Different units may be used depending on whether specific heat is measured in s of grams or kilograms, and joules or calories.

  Spectroscope

  A device that breaks incoming light down into spectral rays, so that one can see the exact wavelength constituents of the light.

  Speed

  A scalar quantity that tells us how fast an object is moving. It measures the rate of change in distance over time. Speed is to be contrasted with velocity in that there is no direction associated with speed.

  Spring

  Objects that experience oscillatory or simple harmonic motion when distorted. Their motion is described by Hooke’s Law.

  Spring constant

  Indicates how “bouncy” or “stiff” a spring is. More specifically, the spring constant, k, is the constant of proportionality between the restoring force exerted by the spring, and the spring’s displacement from equilibrium. The greater the value of k, more resistant the spring is to being displaced.

  Standing wave

  A wave that interferes with its own reflection so as to produce oscillations which stand still, rather than traveling down the length of the medium. Standing waves on a string with both ends tied down make up the harmonic series.

  Static friction

  The force between two surfaces that are not moving relative to one another. The force of static friction is parallel to the plane of contact between the two objects and resists the force pushing or pulling on the object.

  Strong nuclear force

  The force that binds protons and neutrons together in the atomic nucleus.

  Sublimation

  The process by which a solid turns directly into gas, because it cannot exist as a liquid at a certain pressure.

  Superposition

  The principle by which the displacements from different waves traveling in the same medium add up. Superposition is the basis for interference.

  System

  A body or set of bodies that we choose to analyze as a group.

  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。

  相关推荐》》》北美留学高峰论坛

  更多SAT考试信息》》》新东方网SAT频道

(责任编辑:张梦璇)

新东方网托福官方微信:新东方托福 (微信号:xdftoefl

最新考试资讯、托福预测、托福解析,请扫一扫二维码,关注我们的官方微信! 

新东方SAT辅导专区

班级名称 上课地点 上课时间 费用 详细

焦点推荐

精品直播

版权及免责声明

凡本网注明"稿件来源:新东方"的所有文字、图片和音视频稿件,版权均属新东方教育科技集团(含本网和新东方网) 所有,任何媒体、网站或个人未经本网协议授权不得转载、链接、转贴或以其他任何方式复制、发表。已经本网协议授权的媒体、网站,在下载使用时必须注明"稿件来源:新东方",违者本网将依法追究法律责任。

本网未注明"稿件来源:新东方"的文/图等稿件均为转载稿,本网转载仅基于传递更多信息之目的,并不意味着赞同转载稿的观点或证实其内容的真实性。如其他媒体、网站或个人从本网下载使用,必须保留本网注明的"稿件来源",并自负版权等法律责任。如擅自篡改为"稿件来源:新东方",本网将依法追究法律责任。

如本网转载稿涉及版权等问题,请作者见稿后在两周内速来电与新东方网联系,电话:010-60908555。