下面为大家整理和推荐的是关于以字母N开头的SAT2物理专业词汇的相关内容，包括了最常见饿SAT2物理考试中的词汇，后面附有详细的英语解释。大家和无忧小编来看看这些词汇的详细内容吧，看看对自己有哪些帮助。

　　Neutrino

　　An almost massless particle of neutral charge that is released along with a beta particle in beta decay.

　　Neutron

　　A neutrally charged particle that, along with protons, constitutes the nucleus of an atom.

　　Neutron number

　　The number, N, of neutrons in an atomic nucleus.

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　　Newton

　　A unit of force: 1 N is equivalent to a 1 kg · m/s2.

　　Newton’s First Law

　　An object at rest remains at rest, unless acted upon by a net force. An object in motion remains in motion, unless acted upon by a net force.

　　Newton’s Law of Universal Gravitation

　　The force of gravity, F, between two particles of mass and , separated by a distance r, has a magnitude of , where G is the gravitational constant. The force is directed along the line joining the two particles.

　　Newton’s Second Law

　　F = ma. The net force, F, acting on an object causes the object to accelerate, a. The magnitude of the acceleration is directly proportional to the net force on the object and inversely proportional to the mass, m, of the object.

　　Newton’s Third Law

　　To every action, there is an equal and opposite reaction. If an object A exerts a force on another object B, B will exert on A a force equal in magnitude and opposite in direction to the force exerted by A.

　　Node

　　The points on a standing wave where total destructive interference causes the medium to remain fixed at its equilibrium position.

　　Normal

　　The line perpendicular to a surface. There is only one normal for any given surface.

　　Normal force

　　The reaction force of the ground, a table, etc., when an object is placed upon it. The normal force is a direct consequence of Newton’s Third Law: when an object is placed on the ground, the ground pushes back with the same force that it is pushed upon. As a result, the net force of an object on the ground is zero, and the object does not move.

　　Nuclear fission

　　A nuclear reaction in which a high-energy neutron bombards a heavy, unstable atomic nucleus, causing it to split into two smaller nuclei, and releasing some neutrons and a vast amount of energy at the same time.

　　Nuclear fusion

　　A nuclear reaction that takes place only at very high temperatures. Two light atoms, often hydrogen, fuse together to form a larger single atom, releasing a vast amount of energy in the process.

　　Nucleus

　　The center of an atom, where the protons and neutrons reside. Electrons then orbit this nucleus.

　　以上就是这些SAT2物理专业词汇的全部内容，都是以字母N开头的。SAT2物理词汇的记忆对成绩的影响很大，大家在备考自己的SAT2物理考试的时候，首先要解决的就是词汇问题。最后祝大家考试顺利。

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