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Author Question: What type of nebula is the Horsehead? a. Primitive b. Bright emission c. Bright reflection d. ... (Read 19 times)

naturalchemist

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on: Jul 28, 2018
What type of nebula is the Horsehead?
 a. Primitive
  b. Bright emission
  c. Bright reflection
  d. Dark

Question 2

The unit called the hertz (Hz) is equivalent to
 a. 1/s only.
  b. a reciprocal second only.
  c. s-1 only.
  d. all of these.


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adammoses97

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Reply #1 on: Jul 28, 2018
Answer to Question 1

d

Answer to Question 2

d


naturalchemist

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Reply #2 on: Jul 28, 2018
TY


adammoses97

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Reply #3 on: Jul 28, 2018
You're welcome


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