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Author Question: In the closed universe model, the geometry of spacetime in two dimensions resembles the surface of a ... (Read 17 times)

tfester

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on: Jul 27, 2018
In the closed universe model, the geometry of spacetime in two dimensions resembles the surface of a
 
  A) saddle.
  B) cylinder.
  C) flat piece of paper.
  D) pyramid.
  E) sphere.

Question 2

On our Moon, Mercury, Earth, and Mars, there are a variety of meteor craters in terms of size. Yet all those found on Venus are over 5 kilometers across. Explain.
 
  What will be an ideal response?


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bookworm410

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

E

Answer to Question 2

The atmosphere of Venus is much thicker, so that only the largest asteroids (probably at least a kilometer across) can survive the fiery transit of this dense atmosphere and arrive intact at the surface to create such damage. Only the strong survive.


tfester

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Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

bulacsom

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Reply 3 on: Yesterday
Wow, this really help

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