Essential Cosmic Perspective
Essential Cosmic Perspective
9th Edition
ISBN: 9780135795033
Author: Bennett
Publisher: PEARSON
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Chapter 17, Problem 1VSC

Part a

To determine

The approximate temperature of the universe at an age of 1015 s.

Part a

Expert Solution
Check Mark

Answer to Problem 1VSC

Solution: Option (b) About 100 K

Explanation of Solution

According to the information provided in the graph the correct option from the given list is (b) about 100 K.

Conclusion:

From the graph, the approximate temperature of the universe at an age of 1015 s is 100 K.

Part b

To determine

the approximate temperature of the universe at an age of 5 minutes.

Part b

Expert Solution
Check Mark

Answer to Problem 1VSC

Solution: Option (c) 109K

Explanation of Solution

According to the information provided in the graph the correct option from the given list is (b) about 109K .

Conclusion:

From the graph, the approximate temperature of the universe at an age of 5 minutes is 109K .

Part c

To determine

Degree of cold in the universe now (from an age of 4×107 s) than it was at an age of 1 second.

Part c

Expert Solution
Check Mark

Answer to Problem 1VSC

Solution: Option (a)

Explanation of Solution

From the graph, the temperature at 1 second since Big Bang was 1010K and the temperature of the universe at 4×107 is 1 K. Hence, the correct option is (a) its current temperature is one ten-billionth ( 1010 ) the temperature at an age of 1 second.

Conclusion:

The universe is 1010 times cooler than it was at the age of 1 second.

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