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Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.
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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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Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?
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The more than 500 species of fruit fly on the various Hawaiian Islands, all apparently descended fro...
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