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Home Q & A Board Science-Related Homework Help Physics Astronomy
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Goose7701 Goose7701
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6 years ago
The energy of an electron state has an uncertainty of about 0.500 eV. What is the uncertainty in the life-time of the level?
 
  A) 1.32  10-15 s
  B) 8.28  10-15 s
  C) 1.32  10-11 s
  D) 8.28  10-11 s
  E) 1.32  10-8 s

Question 2

Consider an atom with four accessible energy levels. What is the maximum number of different wavelengths that could be emitted by such an atom?
 
  A) 7
  B) 4
  C) 6
  D) 5
  E) 8

Question 3

During a reaction, 1.7  10-4 J of energy is released. What change of mass would cause this?
 
  A) 5.1  10-4 kg
  B) 4.3  10-11 kg
  C) 1.5  10-13 kg
  D) 4.8  10-18 kg
  E) 1.9  10-21 kg
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StevenSteven
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Goose7701 Author
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6 years ago
Thanks
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Yesterday
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2 hours ago
This helped my grade so much Perfect
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