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Author Question: Sound vibrations with frequencies less than 20 Hz are called A) infrasonics. B) ultrasonics. C) ... (Read 38 times)

jman1234

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on: Jul 29, 2018
Sound vibrations with frequencies less than 20 Hz are called
 
  A) infrasonics.
  B) ultrasonics.
  C) supersonics.
  D) infrared.
  E) megasonics.

Question 2

An object is thrown upwards with a speed of 16 m/s. How long does it take it to reach a height of 7.0 m on the way up?
 
  A) 0.52 s
  B) 1.2 s
  C) 2.4 s
  D) 3.1 s
  E) 4.2 s


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brittrenee

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

A

Answer to Question 2

A


jman1234

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Reply #2 on: Jul 29, 2018
Thanks


brittrenee

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Reply #3 on: Jul 29, 2018
Welcome :)


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