2017-08-06 136阅读
SAT2考试时间为一小时,大部分为选择题,主要考察学生某一专业的知识,每科满分为800分,学生可以根据所申请的各专业和学校的要求参加。下面提供SAT2物理考试常用术语汇总的Q和R部分。
Q
Quark
The building blocks of all matter, quarks are the constituent parts of protons, neutrons, and mesons.
R
Radian
A unit for measuring angles; also called a “rad.” 2π rad = 360o.
Radiation
Heat transfer via electromagnetic waves.
Radioactive decay
The process by which unstable nuclei spontaneously release particles and/or energy so as to come to a more stable arrangement. The most common forms of radioactive decay are alpha decay, beta decay, and gamma decay.
Radioactivity
An object is called radioactive if it undergoes radioactive decay.
Radius of curvature
With spherical mirrors, the radius of the sphere of which the mirror is a part.
Raraction
An area of high air pressure that acts as the wave trough for sound waves. The spacing between successive raractions is the wavelength of sound, and the number of successive areas of raraction that arrive at the ear per second is the frequency, or pitch, of the sound.
Real image
An image created by a mirror or lens in such a way that light does actually come from where the image appears to be. If you place a screen in front of a real image, the image will be projected onto the screen.
Rlect
A wave on a string that is tied to a pole at one end will rlect back toward its source, producing a wave that is the mirror-image of the original and which travels in the opposite direction.
Rlected ray
The ray of light that is rlected from a mirror or other rlecting surface.
Rlection
The phenomenon of light bouncing off a surface, such as a mirror.
Rracted ray
The ray of light that is rracted through a surface into a different medium.
Rraction
The bending of light as it passes from one medium to another. Light rracts toward the normal when going from a less dense medium into a denser medium and away from the normal when going from a denser medium into a less dense medium.
Restoring force
The force that causes simple harmonic motion. The restoring force is always directed toward an object’s equilibrium position.
Right-hand rule
A means of dining the direction of the cross product vector. To dine the direction of the vector , position your right hand so that your fingers point in the direction of A, and then curl them around so that they point in the direction of B. The direction of your thumb shows the direction of the cross product vector.
Rigid body
An object that retains its overall shape, meaning that the particles that make up the rigid body stay in the same position relative to one another.
Rotational kinetic energy
The energy of a particle rotating around an axis.
Rotational motion
Occurs when every point in the rigid body moves in a circular path around a line called the axis of rotation.
Rutherford nuclear model
The model of the atom according to which negatively charged electrons orbit a positively charged nucleus. This model was developed by Ernest Rutherford in light of the results from his gold foil experiment.
Copyright 2000 - 2020 北京澳际教育咨询有限公司
www.aoji.cn All Rights Reserved | 京ICP证050284号
总部地址:北京市东城区 灯市口大街33号 国中商业大厦2-3层
马育 向我咨询
行业年龄 23年
成功案例 7231人
17年来为数千名学生打开通往新世界的大门,擅长名校申请和签证指导。专业的服务深受学生和家长们的认可。多次获得澳际集团 金牌服务奖杯
高国强 向我咨询
行业年龄 11年
成功案例 2937人
留学关乎到一个家庭的期望以及一个学生的未来,作为一名留学规划导师,我一直坚信最基本且最重要的品质是认真负责的态度。基于对学生和家长认真负责的原则,结合丰富的申请经验,更有效地帮助学生清晰未来发展方向,顺利进入理想院校。
薛占秋 向我咨询
行业年龄 10年
成功案例 1869人
从业3年来成功协助数百同学拿到英、美、加、澳等各国学习签证,递签成功率90%以上,大大超过同业平均水平。
Tara 向我咨询
行业年龄 6年
成功案例 1602人