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Author Question: The radioactive age of a rock is actually the length of time since the material in that rock was ... (Read 115 times)

tth

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on: Jul 27, 2018
The radioactive age of a rock is actually the length of time since the material in that rock was last ____.
 
  a. formed
 b. erupted
 c. concentrated
  d. melted
 e. condensed

Question 2

Groombridge 34 is an M2 main sequence star. Based on this information, which statement is true?
 
  a. Groombridge 34 has a surface temperature that is more than the Sun.
 b. Groombridge 34 has mass that is greater than the Sun.
 c. Groombridge 34 is less luminous than the Sun.
 d. Groombridge 34 is more luminous than the Sun.
 e. Groombridge 34 is located near the upper left hand corner on the HR diagram.


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momolu

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

d

Answer to Question 2

c


tth

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Reply 2 on: Jul 27, 2018
Gracias!

alexanderhamilton

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Reply 3 on: Yesterday
Wow, this really help

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