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The changing in position of an object relative to a reference point; an imaginary line joining the object to the reference point changes in length and direction or both. |
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Movement in a straight line at a constant speed. |
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Distance travelled in a specific time. |
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Speed and direction of an object. |
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Quantity that indicates magnitude only. |
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Quantity that indicates magnitude and direction. |
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Scaler quantity that measures how far an object has travelled. |
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Vector quantity that measures the change in direction and the change in direction or position of an object. |
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Change in velocity during a specific time interval. |
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Push or pull applied to an object; measured in Newtons. |
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A measure of the amount of energy transferred from one object to another when an object moves against an opposing force or the speed of an object increases; calculated by multiplying the force acting on an object by the distance the object travels. |
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Potential energy stored in the chemical bonds of compounds. |
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Work done by moving charges; energy produced by moving electrons. |
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Potential energy stored in the nucleus of an atom. |
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Energy of a moving object. |
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Gravitational Potential Energy |
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Energy of an object because of its position above the surface of earth. |
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Energy due to the motion and position of an object. |
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Study of the interrelationships between heat, work and energy. |
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Energy transferred from an object at a higher temperature to one at a lower temperature; thermal energy. |
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Energy that is stored and held in readiness; energy that has the potential to do work; types of potential energy include gravitational, elastic, and chemical. |
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Energy stored in an object that has its shape changed by stretching, twisting or compressing. |
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Energy of a moving object. |
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Energy due to the motion and position of an object. |
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Electrical generating station that uses thermal energy to produce steam to drive turbines; sources of thermal energy include coal, natural gas, and nuclear energy. |
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A set of interconnected parts; a system can be classified as open, closed or isolated. |
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A system that exchanges both matter and energy with its surroundings. |
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Any system that exchanges energy with its surrounding but does not exchange matter. |
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System that cannot exchange either matter or energy with its surroundings. |
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First Law of Thermodynamics |
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Definition
The total energy, including heat, in a system and its surroundings remain constant. |
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Hypothetical machine in which all the input energy is converted completely into mechanical energy; also called perpetual motion machine. |
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Hypothetical machine in which all the input energy is converted completely into mechanical energy; also called perfect machine. |
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Second Law of Thermodynamics |
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Heat always flow naturally from a hot object to a cold object, never naturally from a cold object to a hot object. |
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Device that converts heat into mechanical energy. |
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Device that uses mechanical energy to transfer heat. |
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Internal Combustion Engine |
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Device in which energy is released by burning fuel inside the engine. |
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Energy needed to do work. |
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Work that a machine is supposed to do. |
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Energy source that is continually and infinitely available. |
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Non-Renewable Energy Source |
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Energy source that is limited and cannot be replaced. |
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Using waste energy from one process to power a second process. |
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Description of any process that will not compromise the survival of living things or future generations while still providing for current energy needs. |
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