Physics
Physics
7th Edition
ISBN: 9780321733627
Author: Douglas C. Giancoli
Publisher: PEARSON
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Chapter 33, Problem 1OQ
To determine

The cause of slowing down of universe expansion.

Expert Solution & Answer
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Answer to Problem 1OQ

Solution:

The gravity is the factor which was assumed to be the cause of the slowing down of the expansion of the universe in earlier days. Therefore, option c is correct.

Explanation of Solution

Option a is wrong since, there is no frictional force present.

The second law of thermodynamics states that the randomness of the universe increases with time. So, this is not the cause of slowing down. Therefore, option b is wrong.

Due to the gravity or gravitational force, the process of expansion may slow down due to the gravitational attraction between objects. So, option c is correct.

The electromagnetic force may be either attractive or repulsive. So, option d is wrong.

Conclusion:

Option c is correct.

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