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Author Question: What percentage of a star's total lifetime is spent on the main sequence? A) 100 B) 50 C) 90 D) ... (Read 114 times)

mia

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on: Jul 27, 2018
What percentage of a star's total lifetime is spent on the main sequence?
 
  A) 100 B) 50 C) 90 D) 20 E) 10

Question 2

The observable universe is the same size today as it was a few billion years ago.
 
  Indicate whether the statement is true or false


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frejo

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Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

FALSE


mia

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Reply 2 on: Jul 27, 2018
:D TYSM

Dnite

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Reply 3 on: Yesterday
Excellent

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