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Author Question: Determine the amount of energy carried in 50 m of a 3.5-mW He-Ne laser beam if the cross-sectional ... (Read 54 times)

xroflmao

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on: Jul 28, 2018
Determine the amount of energy carried in 50 m of a 3.5-mW He-Ne laser beam if the cross-sectional area of the beam is 5.0  10-6 m2.
 a. 2.9  108 J
  c. 0.024 J
  b. 5.8  1010 J
  d. 2.9  1010 J

Question 2

If two adjacent frequencies of an organ pipe closed at one end are 500 Hz and 700 Hz, what is the length of the organ pipe? (vsound = 340 m/s)
 a. 0.85 m
  c. 1.50 m
  b. 1.25 m
  d. 1.70 m


kmb352

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

B

Answer to Question 2

A


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