Centennial of Lusitania Sinking

Plane waves in water of 100  Pa effective (rms) pressure are incident normally on a sand bottom. The sand has density 2000  kg / m^3 and sound speed 2000  m / s. (a) What is the effective pressure of the wave reflected back into the water? (b) What is the effective pressure of the wave transmitted into the sand? (c) What is the power reflection coefficient? (d) What is the smallest angle of incidence at which all of the incident energy will be reflected? | Numerade

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SOLVED: c) A plane wave in water of 100 Pa effective (rms) pressure are incident normally on a sand bottom. The sand has density 2000 kg/m and sound speed 2000 m/s. What is the effective pressure (rms) of the wave reflected back into the water? What is the effective pressure of the wave transmitted into the sand? What is the power reflection coefficient? What is the power transmission coefficient? Assume for water, the density is 1000 kg/m' and the speed of sound is 1480 m/s.