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Author Question: The magnitude of the Poynting vector of a planar electromagnetic wave has an average value of 0.939 ... (Read 514 times)

mynx

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on: Jul 29, 2018
The magnitude of the Poynting vector of a planar electromagnetic wave has an average value of 0.939 W/m2.
 
  The wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. How much total electromagnetic energy falls on the area during 1.0 minute? (c = 3.0 x 108 m/s, 0 = 4  10-7 T  m/A, 0 = 8.85  10-12 C2/N  m2)
  A) 210 J B) 170 J C) 340 J D) 250 J E) 300 J

Question 2

The absolute temperature of an ideal gas is directly proportional to which of the following quantities?
 
  A) the average speed of its molecules
  B) the average momentum of its molecules
  C) the average kinetic energy of its molecules
  D) the mass of its molecules
  E) It is proportional to all of the above quantities.


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spencer.martell

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

B

Answer to Question 2

C


mynx

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Reply 2 on: Jul 29, 2018
Gracias!

jomama

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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