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Author Question: A sound level of 19 dB is how many times as intense as one of 10 dB? a. 8 b. 9 c. 3 d. ... (Read 30 times)

fox

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  • Posts: 540
on: Jul 28, 2018
A sound level of 19 dB is how many times as intense as one of 10 dB?
 a. 8
  b. 9
  c. 3
  d. 18

Question 2

An energy of 13.6 eV is needed to ionize an electron from the ground state of a hydrogen atom. Selecting the longest wavelength that will work from the those given below, what wavelength is needed if a photon accomplishes this task?
 a. 60 nm
  b. 80 nm
  c. 70 nm
  d. 90 nm
  e. 40 nm


canderson530

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Reply #1 on: Jul 28, 2018
Answer to Question 1

a

Answer to Question 2

d


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