Choose the best answer to the following. Explain your reasoning with one or more complete sentences. When we observe a distant galaxy, whose photons have traveled for 10 billion years before reaching Earth, we are seeing that galaxy as it was when the universe was about (A) 10 billion years old. (B) 7 billion years old. (C) 4 billion years old.

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Answer 1

Question

Chapter 21, Problem 23EAP

To determine

Choose the best answer to the following. Explain your reasoning with one or more complete sentences.

When we observe a distant galaxy, whose photons have traveled for 10 billion years before reaching Earth, we are seeing that galaxy as it was when the universe was about (A) 10 billion years old. (B) 7 billion years old. (C) 4 billion years old.

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Answer 2

Question

Chapter 21, Problem 23EAP

To determine

Choose the best answer to the following. Explain your reasoning with one or more complete sentences.

When we observe a distant galaxy, whose photons have traveled for 10 billion years before reaching Earth, we are seeing that galaxy as it was when the universe was about (A) 10 billion years old. (B) 7 billion years old. (C) 4 billion years old.

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Answer 3

Question

Chapter 21, Problem 23EAP

To determine

Choose the best answer to the following. Explain your reasoning with one or more complete sentences.

When we observe a distant galaxy, whose photons have traveled for 10 billion years before reaching Earth, we are seeing that galaxy as it was when the universe was about (A) 10 billion years old. (B) 7 billion years old. (C) 4 billion years old.

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Answer 4

Question

Chapter 21, Problem 23EAP

To determine

Choose the best answer to the following. Explain your reasoning with one or more complete sentences.

When we observe a distant galaxy, whose photons have traveled for 10 billion years before reaching Earth, we are seeing that galaxy as it was when the universe was about (A) 10 billion years old. (B) 7 billion years old. (C) 4 billion years old.

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Answer 5

Chapter 21, Problem 23EAP

To determine

Choose the best answer to the following. Explain your reasoning with one or more complete sentences.

When we observe a distant galaxy, whose photons have traveled for 10 billion years before reaching Earth, we are seeing that galaxy as it was when the universe was about (A) 10 billion years old. (B) 7 billion years old. (C) 4 billion years old.

Answer 6

Chapter 21, Problem 23EAP

To determine

Choose the best answer to the following. Explain your reasoning with one or more complete sentences.

When we observe a distant galaxy, whose photons have traveled for 10 billion years before reaching Earth, we are seeing that galaxy as it was when the universe was about (A) 10 billion years old. (B) 7 billion years old. (C) 4 billion years old.

Answer 7

Chapter 21, Problem 23EAP

To determine

Choose the best answer to the following. Explain your reasoning with one or more complete sentences.

When we observe a distant galaxy, whose photons have traveled for 10 billion years before reaching Earth, we are seeing that galaxy as it was when the universe was about (A) 10 billion years old. (B) 7 billion years old. (C) 4 billion years old.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 21 - Prob. 1VSC Ch. 21 - Prob. 2VSC Ch. 21 - Prob. 3VSC Ch. 21 - Prob. 4VSC Ch. 21 - Prob. 1EAP Ch. 21 - Prob. 2EAP Ch. 21 - Prob. 3EAP Ch. 21 - Prob. 4EAP Ch. 21 - Prob. 5EAP Ch. 21 - Prob. 6EAP

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Chapter 21 Solutions