Determine the Intensity (In W/m²) of a Harmonic Longitudinal Wave $\rho$

question 23

Multiple Choice

Determine the intensity (in W/m²) of a harmonic longitudinal wave with a pressure amplitude of 8.0 * 10-3 N/m² propagating down a tube filled with helium. ( $\rho$ = 0.179 kg/m3, v = 972 m/s.)

• A)3.7 * 10-7
• B)1.8 *10-7
• C)9.2 *10-8
• D)4.6*10-8
• E)1.5* 10-9

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