Carole owns a two story house with a heating and cooling unit on each floor. in the winter she mostly uses the downstairs unit because the volume of warm air and warming the whole house through
a) expands, rises, convection
b) expands, sinks, conduction
c) contracts, rises, conversion
d) contracts, sinks, contraption
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Carole owns a two story house with a heating and cooling unit on each floor. in the winter she mostl...
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