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| 标题 | Sat考试物理常用术语词汇整理（B） |
| 内容 | 为了方便广大考生更好的复习，新航道整理了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。 B Basis vector A vector of magnitude 1 along one of the coordinate axes. Generally, we take the basis vectors to be and , the vectors of length 1 along the x- and y-axes, respectively. Beats When two waves of slightly different frequencies interfere with one another, they produce a “beating” interference pattern that alternates between constructive (in-phase) and destructive (out-of-phase). In the case of sound waves, this sort of interference makes a “wa-wa-wa” sound, and the frequency of the beats is equal to the difference in the frequencies of the two interfering waves. Beta decay A form of radioactive decay where a heavy element ejects a beta particle and a neutrino, becoming a lighter element in the process. Beta particle A particle, identical to an electron. Beta particles are ejected from an atom in the process of beta decay. Bohr atomic model A model for the atom developed in 1913 by Niels Bohr. According to this model, the electrons orbiting a nucleus can only orbit at certain particular radii. Excited electrons may jump to a more distant radii and then return to their ground state, emitting a photon in the process. Boiling point The temperature at which a material will change phase from liquid to gas or gas to liquid. Boyle’s Law For a gas held at a constant temperature, pressure and volume are inversely proportional. 更多sat考试干货敬请关注新航道sat考试频道 |
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