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

Question 42

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. (ρ = 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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