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SAT2物理词汇术语整理16

2019-10-02 22:13:48来源:网络

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

  M

  Magnetic flux

  The dot product of the area and the magnetic field passing through it. Graphically, it is a measure of the number and length of magnetic field lines passing through that area. It is measured in Webers (Wb).

  Magnification

  The ratio of the size of the image produced by a mirror or lens to the size of the original object. This number is negative if the image is upside-down.

  Magnitude

  A property common to both vectors and scalars. In the graphical representation of a vector, the vector’s magnitude is equal to the length of the arrow.

  Margin of error

  The amount of error that’s possible in a given measurement.

  Mass

  A measurement of a body’s inertia, or resistance to being accelerated.

  Mass defect

  The mass difference between a nucleus and the sum of the masses of the constituent protons and neutrons.

  Mass number

  The mass number, A, is the sum of the number of protons and neutrons in a nucleus. It is very close to the weight of that nucleus in atomic mass units.

  Maxima

  In an interference or diffraction pattern, the places where there is the most light.

  Mechanical energy

  The sum of a system’s potential and kinetic energy. In many systems, including projectiles, pulleys, pendulums, and motion on frictionless surfaces, mechanical energy is conserved. One important type of problem in which mechanical energy is not conserved is the class of problems involving friction.

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