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Author Question: A certain electric furnace consumes 24 kW when it is connected to a 240-V line. What is the ... (Read 3 times)

Arii_bell

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on: Jul 29, 2018
A certain electric furnace consumes 24 kW when it is connected to a 240-V line. What is the resistance of the furnace?
 
  A) 1.0 k
  B) 10
  C) 2.4
  D) 0.42
  E) 100

Question 2

A photocathode has a work function of 2.8 eV. The photocathode is illuminated with monochromatic radiation whose photon energy is 4.0 eV. The threshold frequency for photoelectron production is closest to:
 
  A) 6.8  1014 Hz
  B) 2.9  1014 Hz
  C) 7.7  1014 Hz
  D) 8.6  1014 Hz
  E) 9.7  1014 Hz


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annierak

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

C

Answer to Question 2

A


Arii_bell

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Reply #2 on: Jul 29, 2018
Thanks


annierak

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


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