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8 Cards in this Set
- Front
- Back
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efficiency
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= useful energy output/ total energy input
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thermal energy
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energy associated with random motion of molecules
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celsisu v. fahrenheit
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cel: melting point at 0 degrees, boiling point at 100 degrees
fah: melting point at 32 degrees, boiling point at 212 degrees |
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temperature of a substance..
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not measure of heat content
=average kinetic energy of its molecules resulting from their motions |
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absolute zero/ absolute temp scale
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absolute zero= molecules have no [kinetic] energy
Kelvin scale |
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energy in automobile
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chemical --> thermal --> mechanical
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heat engine
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converts thermal energy into mechanical energy
high temp heat, produced by burning fuel, partly converted to mechanical energy to do work, rest is injected into atmosphere (as low temp exhaust) |
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efficiency=
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work/ heat energy
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