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22 Cards in this Set
- Front
- Back
Radiant energy is in the form of ____________ waves.
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electromagnetic
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Rising warm air cools because _______.
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the air molecules slow up as they collide with other molecules moving up.
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500 J of heat is added to a system that performs 100 J of work. The internal energy of the system is:
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400 J
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The First Law of Thermodynamics is most closely related to the:
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conservation of energy
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The maximum amount of heat energy that can be converted into mechanical energy is
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<100%
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The wavelength of radiant energy emitted by an object is detrermied by
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its temperature
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A good absorber of radient energy:
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reflects very little radiant energy
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The two concepts require to explain the greenhouse effect are
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all substances radiate energy and the transparency of substances depends on the wavelength of radiation
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The direction of spontaneous transfer of heat is always
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from warmer to cooler objects
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By which means is heat transferred the fastest
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radiation
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The greater the difference in temperature between the input reservior and output reservior for a heat engine the
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greater the efficency
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The transfer of heat by the movement of hotter substances is called
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convection
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The equalization of temperature between two objects is brought about by
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conduction, convection, and radiation.
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Heat is transferred through metal by:
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conduction
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materials composed of loose outer electrons are ______ conductors of heat and electricity
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great
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Heat transferred from one molecture to another molecule
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conduction
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__________ currents cause winds.
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convection
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All objects continually emit _____________ energy in a mixture of wavelengths
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radiant
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good absorbers are ______ (good/bad) emitters
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good
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The coldest limit is _______ C and _______ K
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-273 C, 0 K
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First Law of Thermodynamics:
Whenever heat is added to a system it transforms to an ________ amount of some other form of ___________ |
equal, energy
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Heat will never flow from a __________ object to a ________ object
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cold, hot
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