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How do scientists use the Doppler effect to measure the actual motion of stars?
asked
Nov 22, 2019
Biology
college
1
answer
3
votes
88.3k
views
Two-thirds of the world's ________________ is found in the Middle East. A. grain production B. water C. oil reserves
asked
Aug 20, 2018
Geography
high-school
2
answers
3
votes
157k
views
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