Geography, 03.02.2020 01:47 arianaguerin
Using the doppler effect, astronomers can determine a star’s age and spectrum elements and chemical composition movement toward or away from earth external temperature and source of origin
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Amountain is larger than a hill, with steep sides true or false
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Simple astronomical telescope the objective lens has a focal length of 75 cm and that of a piece of 5cm of the lenses are 18 cm apart when will be final image of a distant object before
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Using the doppler effect, astronomers can determine a star’s age and spectrum elements and chemical...
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