SAT2物理专业词汇P.

　　下面为大家搜集和整理的是关于SAT2物理专业词汇方面的信息，主要是以字母P开头的词汇，包括了详细的英文解析。SAT2物理考试对考生在词汇能力方面的掌握要求很高，下面大家就和澳际小编一起来看看详细内容吧

　　Pascals

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　　The unit for measuring pressure. One Pascal is equal to one Newton per meter squared, 1 Pa = 1 N/m2.

　　Pendulum

　　A pendulum consists of a bob connected to a rod or rope. At small angles, a pendulum’s motion approximates simple harmonic motion as it swings back and forth without friction.

　　Period

　　The time it takes a system to pass through one cycle of its repetitive motion. The period, T, is the inverse of the motion’s frequency, f = 1/T.

　　Phase

　　Two oscillators that have the same frequency and amplitude, but reach their maximum displacements at different times, are said to have different phases. Similarly, two waves are in phase if their crests and troughs line up exactly, and they are out of phase if the crests of one wave line up with the troughs of the other.

　　Phase change

　　When a solid, liquid, or gas changes into another phase of matter.

　　Photoelectric fect

　　When electromagnetic radiation shines upon a metal, the surface of the metal releases energized electrons. The way in which these electrons are released contradicts classical theories of electromagnetic radiation and supports the quantum view according to which electromagnetic waves are treated as particles.

　　Photoelectron

　　The name of an electron released from the surface of a metal due to the photoelectric fect.

　　Photon

　　A small particle-like bundle of electromagnetic radiation.

　　Pitch

　　Another word for the frequency of a sound wave.

　　Planck’s constant

　　A constant, J · s, which is usul in quantum physics. A second constant associated with Planck’s constant is .

　　Polarization

　　A process that aligns a wave of light to oscillate in one dimension rather than two.

　　Potential energy

　　Energy associated with an object’s position in space, or configuration in relation to other objects. This is a latent form of energy, where the amount of potential energy rlects the amount of energy that potentially could be released as kinetic energy or energy of some other form.

　　Power

　　Dined as the rate at which work is done, or the rate at which energy is transformed. P is measured in joules per second (J/s), or watts (W).

　　Pressure

　　A measure of force per unit area. Pressure is measured in N/m2 or Pa.

　　Principal axis

　　The straight line that runs through the focal point and the vertex of a mirror or lens.

　　Proton

　　A positively charged particle that, along with the neutron, occupies the nucleus of the atom.

　　Pulley

　　A pulley is a simple machine that consists of a rope that slides around a disk or block.

　　以上就是关于以字母P开头的SAT2物理专业词汇的全部内容，不是很多，但是相对比较重要，因为需要考生理解和记忆。大家可以在备考自己的SAT2物理考试的时候，针对自己的实际情况，有选择性的进行熟悉和记忆。

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