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Author Question: Calculate the pressure amplitude (in N/m2) of a 500 Hz sound wave in helium if the displacement ... (Read 37 times)

maegan_martin

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Calculate the pressure amplitude (in N/m2) of a 500 Hz sound wave in helium if the displacement amplitude is equal to 5.0  10-8 m. (r = 0.179 kg/m3, v = 972 m/s.)
 a. 3.5  10-2
  b. 1.6  10-2
  c. 2.7  10-2
  d. 4.2  10-2
  e. 2.0  10-2

Question 2

To transmit four times as much energy per unit time along a string, you can
 a. double the frequency.
  b. double the amplitude. c. increase the tension by a factor of 16.
  d. do any one of the above. e. do only (a) or (b) above.



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flexer1n1

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Answer to Question 1

C

Answer to Question 2

D




maegan_martin

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Reply 2 on: Jul 28, 2018
Thanks for the timely response, appreciate it


JCABRERA33

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Reply 3 on: Yesterday
Great answer, keep it coming :)

 

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