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Social Sciences 9 Online
OpenStudy (anonymous):

How long is the moon’s rotational period? A. the same as its period of revolution B. half its period of revolution C. twice its period of revolution D. one-fourth its period of revolution

OpenStudy (ryjhbl):

A the Moon's rotation period is precisely equal to its period of revolution about Earth—27.3 days . for more reading http://lifeng.lamost.org/courses/astrotoday/CHAISSON/AT308/HTML/AT30803.HTM

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