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Author Question: A 140-keV photon strikes an electron and scatters through an angle of 120 from its original ... (Read 21 times)

ETearle

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on: Jul 29, 2018
A 140-keV photon strikes an electron and scatters through an angle of 120 from its original direction.
 
  (melectron = 9.11  10-31 kg, c = 3.00  108 m/s, h = 6.626  10-34 J  s)
  (a) What is the wavelength of the photon before scattering?
  (b) What is the photon wavelength after scattering?

Question 2

A +5.0-C point charge is placed at the 0 cm mark of a meter stick and a -4.0-C charge is placed at the 50 cm mark. What is the net electric field at the 30 cm mark? (k = 1/40 = 8.99  109 N  m2/C2)
 
  A) 4.0  105 N/C
  B) 5.0  105 N/C
  C) 9.0  105 N/C
  D) 1.4  106 N/C


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poopface

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

(a) 8.87 pm (b) 12.50 pm

Answer to Question 2

D


ETearle

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Reply #2 on: Jul 29, 2018
Thanks


poopface

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


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