50.47. Hell, Vorobyov

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Uploaded: 16.03.2014
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Calculate the mean free path of the phonons in quartz, SiO2 at a certain temperature, if at the same temperature thermal conductivity 13Vt / (m • K), the molar heat capacity C = 44Dzh / (mol • K) and the average speed of sound is  5km / s. Density  quartz is 2,65 • ³kg / m³.

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