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21 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Conserved quantity
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Unchanging in time. Always the same amount though it may change form. Ex. Energy and mass.
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Conservation of mass
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Mass cannot be created or destroyed.
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Atomic mass number
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Total number of protons and neutrons in the nucleus of an atom.
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Linear momentum
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Measures the amount of motion in a straight line. Mass x velocity. (restatement of Newton's first law)
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Angular momentum
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Measures the amount of rotational energy that an object has.
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Conservation of energy
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Energy cannot bee created or destroyed.
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Conservation
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Doesn't change with time but may change form.
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Momentum
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Mass x velocity
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Potential energy
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Depends on the position of the object or its parts.
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Kinetic energy
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Energy of motion.
KE= 1/2 x mass x speed ^2 |
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Mechanical energy
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Kinetic or potential energy of large macroscopic objects.
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Internal energy
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Energy hidden within objects, manifests in temperature, shape, physical state (solid, liquid, gas), chemical comp., etc. Microscopic.
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Gravitational potential energy
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Energy stored in an object that has potential to fall.
GPE= weight x height |
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Electrical potential energy
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Energy with relative positions of charged objects. Opposite charges are greatest farther apart, same charges closer. Type of energy in lightning clouds.
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Work
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Process by which energy is transferred to or from an object by exerting a force on the object.
Work= force x distance parallel to direction of force. |
Must be in direction of motion.
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Thermal energy
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Internal energy associated with temperature. (heat energy).
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Perpetual motion machines
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Keeps moving forever without any energy being added.
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Chemical potential energy
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Internal energy of physical an chemical states os matter. (type of energy in a car battery.
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Nuclear potential energy
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Energy stored in nucleus of an atom.
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Rest mass
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Mass of an object when at rest relative to the observer.
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Relativistic mass
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The increased mass of an object moving at high speed.
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