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Author Question: Reflection, refraction, and the formation of images by mirrors and lenses has been successful ... (Read 114 times)

sheilaspns

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on: Jul 29, 2018
Reflection, refraction, and the formation of images by mirrors and lenses has been successful described by the
 
  A)
 
  wave model of light.
  B)
 
  ray model of light.
  C)
 
  particle model of light.
  D)
 
  electro model of light.
  E)
 
  none of the given answers

Question 2

A car horn emits a frequency of 400 Hz. A car traveling at 20.0 m/s sounds the horn as it approaches a stationary pedestrian.
 
  What frequency does the pedestrian hear? The speed of sound in air is 343 m/s.
  A)
 
  200 Hz
 
  B)
 
  375 Hz
 
  C)
 
  400 Hz
 
  D)
 
  425 Hz
 
  E)
 
  450 Hz


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Shshxj

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

B

Answer to Question 2

D


sheilaspns

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Reply #2 on: Jul 29, 2018
Thank you!


Shshxj

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Reply #3 on: Jul 29, 2018
Always glad to help...


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