Calculate the pressure amplitude (in N/m2) of a 500 Hz sound wave ...

[maegan_martin]

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.

[flexer1n1]

Answer to Question 1

C

Answer to Question 2

D

[maegan_martin]

Gracias!

[tranoy]

Excellent