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Author Question: A factory siren indicating the end of a shift has a frequency of 80 Hz. What frequency is perceived ... (Read 82 times)

jazziefee

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on: Jul 27, 2018
A factory siren indicating the end of a shift has a frequency of 80 Hz. What frequency is perceived by the occupant of a car traveling towards the factory at 30 m/s? The speed of sound in air is 343 m/s.
 
  A) 83 Hz
  B) 85 Hz
  C) 87 Hz
  D) 89 Hz
  E) 91 Hz

Question 2

Which color of light has the lowest energy photons?
 
  A) red
  B) yellow
  C) green
  D) blue
  E) orange


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meltdown117

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Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

A


jazziefee

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Reply 2 on: Jul 27, 2018
Great answer, keep it coming :)

helenmarkerine

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Reply 3 on: Yesterday
Excellent

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