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1 (a) . Show that the zero-point energy of a Debye solid composed of N atoms...

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Physics

1 (a) . Show that the zero-point energy of a Debye solidcomposed of N atoms is equal to 9/8NkΘD. This implies, for eachvibrational mode of the solid, a mean zero-point energy 3/8 kΘD,that is,  = 3/4 ωD.

(b)Show that, for T < θd,=\"\" the=\"\" quantity=\"\">P − CV) ofa Debye solid varies as T7 and hence the ratio(CP/CV)  1

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