Power in a Sound Wave The power of sound: Suppose a tube is filled with Helium g

Question

Power in a Sound Wave The power of sound: Suppose a tube is filled with Helium gas at a pressure of 0.11 MPa and a temperature of 297 K. If a piston of area of 400 mm^2 at one end of the tube creates sound by moving sinusoidally with a frequency of 60 Hz, creating a wave with amplitude of 3.8 mm: What power goes into the sound waves formed? Gauge Pressure A tank of liquid of density rho is accelerating to the right with an acceleration a, which is less than g The deadly of the liquid is constant and uniform. The tank is open at the top. 10. How does the gauge pressure in the tank vary with depth, y. below the surface? (i e., find P_guage in terms of y, rho, a and constants). 11. What is the buoyant force on the body of volume V submerged in the liquid? 12. What is the buoyant force on the body if the tank is falling freely?

Explanation / Answer

Answer 9

P = 1/2 2A V Smax2

= 0.5 * 0.11*10^6 * 1007 * ( 2pi * 60)^2*400*(10^-3)^2 * ( 3.8 * 10^-3)^2

= 45.46 KW is the answer

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