Explanation In general, the mass of the central body depends on the orbital speed. If there were no dark matter in galaxy, then the stars would orbit around the Milky way is slower, so the period would be longer. Hence the correct option is A Longer...

College Physics: A Strategic Approach (3rd Edition)

3rd Edition

ISBN: 9780321879721

Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field

Publisher: PEARSON

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Chapter P.1, Problem 1P

To determine

The period, when there is no dark matter in the galaxy.

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Chapter 30, Problem 76MSPP

Chapter P.1, Problem 2P

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Chapter P Solutions

College Physics: A Strategic Approach (3rd Edition)

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The period, when there is no dark matter in the galaxy.

Solution Summary: The author explains that the correct option is A. Longer. The time period of galaxy is not smaller or same when there is no dark matter in the galaxy.

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The period, when there is no dark matter in the galaxy.

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