Science test 1 (energy)
Terms
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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
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No system can reach absolute zero
Physicists have been within less than a millionth of 1K, but never 0K - Equation of KE
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1/2 * kg * M^2/S^2
1/2 * mass * velocity^2 - Formula for Joule
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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
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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