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### 16 Cards in this Set

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 Thermal Energy The total energy in a substance (KE adn PE) Force Any influence that can cause an object to be accelerated, measured in newtons in the metric system and in pounds in the British system Potential Energy The stored energy that an object posseses because of it's position First Law of Thermodynamics Whenever heat flows into or out of a system. The gain or loss of thermal energy equals the amount of heat transfered Kinetic Energy Energy of motion possesed by moving objects Mechanical Work Energy that comes from the energy you put in to begin with Second law of thermodynamics Heat never spontaneously flows from a cold substance to a hot substance Equation for PE kg * m * 10 mass * length * acc. of gravity Third law of thermodynamics No system can reach absolute zero Physicists have been within less than a millionth of 1K, but never 0K Equation of KE 1/2 * kg * M^2/S^2 1/2 * mass * velocity^2 Formula for Joule kg * M^2/S^2 mass * length^2/time^2 What is thermal expansoin? When molecules in a hot substance juggle faster and move further apart Acceleration of gravity The change in an objects speed per time that goes by 10m per second per second What is sublimation? When molecules jump directly from a solid to a gaseous phase Is condensation a warming process? Yes. When gas molecules strike the liquid with increased KE it increases the average KE of the liquid The law of Interta Things _____ to keep doing what they're already doing