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Author Question: A 200-m radio telescope is used to investigate sources emitting a 21-cm wavelength. The minimum ... (Read 63 times)

mspears3

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on: Jul 29, 2018
A 200-m radio telescope is used to investigate sources emitting a 21-cm wavelength. The minimum angular separation resolvable for this system is
 
  A)
 
  0.073.
  B)
 
  0.03.
  C)
 
  0.0013.
  D)
 
  0.154.
  E)
 
  0.0026.

Question 2

Two charges QA = +2 C and QB = - 6C are located on the x-axis at xA= - 1 cm and xB= +2 cm respectively. Where should a third charge, QC = + 3C, be placed on the positive x-axis so that the potential at the origin is equal to zero?
 
  A)
 
  x = 4 cm
  B)
 
   x = +1 cm
  C)
 
  x =+2 cm
  D)
 
   x = 3 cm
  E)
 
  x = 5 cm


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randomguy133

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

A

Answer to Question 2

D


mspears3

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Reply #2 on: Jul 29, 2018
Thanks


randomguy133

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Reply #3 on: Jul 29, 2018
Welcome :)


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