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Biology, 21.06.2019 19:30
Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?
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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 02:00
What would happen if the krill were removed from the food web
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Biology, 22.06.2019 06:20
All organisms contribute some water to the water cycle by conducting
Answers: 1
List three activities of a cell that help it live...
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