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
C
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