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Author Question: A concave mirror has A) no focal length. B) a positive or negative focal length ... (Read 40 times)

cool

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on: Jul 29, 2018
A concave mirror has
 
  A)
 
  no focal length.
  B)
 
  a positive or negative focal length depending on the object position.
  C)
 
  a positive focal length.
  D)
 
  a negative focal length.
  E)
 
  a positive or negative focal length depending on the object size.

Question 2

An object is moving with constant non-zero velocity on the +x axis. The position versus time graph of this object is
 
  A)
 
  a horizontal straight line.
  B)
 
  a vertical straight line.
  C)
 
  a straight line making an angle with the time axis.
  D)
 
  a parabolic curve.
  E)
 
  a hyperbolic curve.


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kingdude89

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Reply #1 on: Jul 29, 2018
Answer to Question 1

C

Answer to Question 2

C


cool

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Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


kingdude89

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Reply #3 on: Jul 29, 2018
Great! Please up vote :D


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