【总结】SATII物理考试常用术语

2011-07-18 13:52:11 来源: 互联网责编：楷维留学指南

好评率:0%

周洋(Ken)顾问 专家顾问 (了解顾问评级) [金牌文书翻译] [包装与形象设计大师] [高级升学导师] [签证方案及材料专家] [高级职业导师] 办理国家：英国德国法国意大利 免费留学方案 签约折扣预约 查看联系方式
好评率:100%

肖书琴顾问 专家顾问 (了解顾问评级) [超级升学导师] [签证方案及材料专家] [高级职业导师] [包装与形象设计大师] 办理国家：英国澳大利亚法国 免费留学方案 签约折扣预约 查看联系方式
好评率:0%

徐莺顾问 行业元老 (了解顾问评级) 办理国家：英国澳大利亚新西兰新加坡 免费留学方案 签约折扣预约 查看联系方式

　　The following list defines all of the bold-faced words you encountered as you read this book.

　　Absolute zero

　　The lowest theoretical temperature a material can have, where the molecules that make up the material have no kinetic energy. Absolute zero is reached at 0 K or –273º C.

　　Acceleration

　　A vector quantity defined as the rate of change of the velocity vector with time.

　　Activity

　　In radioactive substances, the number of nuclei that decay per second. Activity, A, will be larger in large samples of radioactive material, since there will be more nuclei.

　　Alpha decay

　　A form of radioactive decay where a heavy element emits an alpha particle and some energy, thus transforming into a lighter, more stable, element.

　　Alpha particle

　　A particle, which consists of two protons and two neutrons. It is identical to the nucleus of a helium atom and is ejected by heavy particles undergoing alpha decay.

　　Amplitude

　　In reference to oscillation, amplitude is the maximum displacement of the oscillator from its equilibrium position. Amplitude tells how far an oscillator is swinging back and forth. In periodic motion, amplitude is the maximum displacement in each cycle of a system in periodic motion. The precise definition of amplitude depends on the particular situation: in the case of a stretched string it would be measured in meters, whereas for sound waves it would be measured in units of pressure.

上一页 1 2 3 4 5 6 7 8 9 10 11 12 下一页