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Author Question: Ocean waves with a wavelength of 120 m are coming in at a rate of 8 per minute. What is their speed? ... (Read 85 times)

waynest

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on: Jul 28, 2018
Ocean waves with a wavelength of 120 m are coming in at a rate of 8 per minute. What is their speed?
 a. 8.0 m/s
  b. 16 m/s
  c. 24 m/s
  d. 30 m/s
  e. 4.0 m/s

Question 2

Bats can detect small objects such as insects that are of a size on the order of a wavelength. If bats emit a chirp at a frequency of 60 kHz and the speed of soundwaves in air is 330 m/s, what is the smallest size insect they can detect?
 a. 1.5 mm
  b. 3.5 mm
  c. 5.5 mm
  d. 7.5 mm
  e. 9.8 mm


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bob

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

B

Answer to Question 2

C


waynest

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Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


bob

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Reply #3 on: Jul 28, 2018
Great! Please up vote :D


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