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Author Question: The end of the last snowball Earth phase roughly coincides with A) the beginning of the Cambrian ... (Read 77 times)

dalyningkenk

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on: Jul 27, 2018
The end of the last snowball Earth phase roughly coincides with
 
  A) the beginning of the Cambrian period which produced an explosion in diversity of life
  B) the appearance of modern hominids
  C) migration of life from the oceans onto land
  D) the appearance of the dinosaurs

Question 2

Using the velocity transformation formula, calculate the speed in the rest frame of a particle which is seen to be moving at c in a moving frame.
 
  What will be an ideal response?


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alvinum

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

A

Answer to Question 2

u = (v+u')/(1+vu/c2 ) = (v+c)/(1+vc/c2 ) = c(v+c)/(c+v) = c
Light speed in one frame will be light speed in all inertial frames.


dalyningkenk

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Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


alvinum

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Reply #3 on: Jul 27, 2018
Great! Please up vote :D


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