 #1
hidemi
 208
 36
 Homework Statement:

The speed of sound in air in 340 m/s, and the density of air is 1.2 kg/m^3. if the displacement amplitude of a 440 Hz sound wave is 10μm. what is the intensity of the wave?
Ans: 32 W/m^2
 Relevant Equations:
 I = 1/2 ρvR²w²
I = 1/2 ρvR²w²
I = 1/2 *1.2kg/m³*340m/s*(10 x 10^6m)²*(2π*440/s)²
I = 0.16 W/m²
This is my answer which does not match the given answer. Am I doing wrong?
I = 1/2 *1.2kg/m³*340m/s*(10 x 10^6m)²*(2π*440/s)²
I = 0.16 W/m²
This is my answer which does not match the given answer. Am I doing wrong?