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In Chapter 22 we saw that the Debye temperature for a solid is typically several hundred kelvins. There are as many phonon states as there are atoms in the solid. Suppose that, for a certain solid at 100 K, the occupation number for a particular phonon state is 1/2.
(a) Roughly what is the occupation number of this state at 0.1 K?
(b) Repeat the above for a state whose occupation number is 1/2 at 5 K.
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This heat loss determines the capacity of the lake to cool the condenser. Justify why the heat transfer correlation you select is useful, even though RaL is outside of its specified range.
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A cable drum for a crane is to rotate between 160 and 166 rpm. Design a gear drive for 25 hp in which the input pinion rotates at 925 rpm and the output rotates with the drum. The crane is expected to operate with a 50% duty cycle for 120 hours per w..
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