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The oscillations for a phonon traveling in the positive x direction can be approximated by a plane wave, y = A cos(kx - ωt), where A is the amplitude, k = 2π/λ is the wave number, and ω = 2π/T is the angular frequency.
(a) What is the speed of this phonon, cs, in terms of ω and k?
(b) If the momentum and energy are given by p = hk and ε = hω, how are the momentum, energy, and wave speed interrelated?
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Air enters a 3600-kW turbine operating at steady state with a mass flow rate of 18 kg/s at 8008C, 3 bar and a velocity of 100 m/s. The air expands adiabatically through the turbine and exits at a velocity of 150 m/s. The air then enters a diffuser..
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