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Author Question: An electron has the same de Broglie wavelength as a 1.8 eV photon. The speed of the electron is ... (Read 100 times)

TFauchery

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on: Jul 29, 2018
An electron has the same de Broglie wavelength as a 1.8 eV photon. The speed of the electron is closest to:
 
  A) 1,100 m/s
  B) 980 m/s
  C) 910 m/s
  D) 840 m/s
  E) 770 m/s

Question 2

A Carnot engine operates between reservoirs at 550K and 300K, discarding 1500 J of heat in each cycle.
  (a) What is the engine's efficiency?
  (b) How much heat is supplied to the engine by the hot reservoir in each cycle?
 
  What will be an ideal response?


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fauacakatahaias

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

A

Answer to Question 2

(a) 45.5 (b) 2750 J


TFauchery

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


fauacakatahaias

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


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