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Biology, 22.06.2019 01:30
Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.
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Biology, 22.06.2019 04:00
Of your good in bio kusing a series of preliminary observations; pstate a problem developed from these observations, formulate a hypothesis, design an experiment to test the hypothesis
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Biology, 22.06.2019 08:20
Which characteristics are typical of a human population in the postindustrial stage?
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Which is not a communicable disease? select one: a. hiv/aids b. tuberculosis c. influenza d. cance...
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