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Author Question: O-type stars A) have lifetimes long enough for advanced life to evolve B) have lifetimes long ... (Read 87 times)

robinn137

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on: Jul 27, 2018
O-type stars
 
  A) have lifetimes long enough for advanced life to evolve
  B) have lifetimes long enough for planets to form and for life to appear, but not long enough for advanced life
  C) do not contain enough heavy elements to form planets
  D) have lifetimes too short for planet formation

Question 2

A force can be exerted on an object and yet do no work.
 
  Indicate whether the statement is true or false


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efwsefaw

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

D

Answer to Question 2

TRUE


robinn137

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Reply 2 on: Jul 27, 2018
Excellent

juliaf

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Reply 3 on: Yesterday
Gracias!

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