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Which of these takes exactly 24 h?

a. one rotation of the Earth
b. one revolution of the moon around the Earth
c. one period between two high tides
d. one period between two full moons

User Frantisek
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2 Answers

1 vote
One rotation of the Earth. The speed is 30 kilometers second ( or about 90 miles per second )
User Keshan De Silva
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3 votes
A. One rotation of the Earth
User Froilan
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