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Author Question: What is the most likely origin of the Valles Marineris on Mars? A) it is a fissure in the surface ... (Read 86 times)

littleanan

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on: Jul 27, 2018
What is the most likely origin of the Valles Marineris on Mars?
 
  A) it is a fissure in the surface carved out by a giant impact
  B) it is a tectonic fracture associated with the formation of the adjacent Tharsis bulge
  C) it is a huge canyon system formed by water erosion
  D) it was formed from the separation of two tectonic plates

Question 2

Central black holes can be very efficient for converting the mass-energy of infalling matter to thermal energy in the accretion disk.
 
  Roughly what percentage of the mass-energy can be converted to other forms of energy as matter falls into a black hole? A) 0.7
  B) 1 - 4
  C) 10 - 40
  D) 100


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juiceman1987

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

B

Answer to Question 2

C


littleanan

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Reply #2 on: Jul 27, 2018
TY


juiceman1987

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Reply #3 on: Jul 27, 2018
You're welcome


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