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A causal discrete-time LTI system is described by y [ n ) - h [ n - 1) + !Y [ n - 2) = x [ n ) where x[ n ] and y[ n ] are the input and output of the system, respectively.
(a) Determine the frequency response H( O) of the system.
(b) Find the impulse response h[ n ] of the system.
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Calculate the expected number of vacancies that will exist in a cubic inch of Aluminum at room temperature (25°C), provided that the activation energy for vacancy formation in Aluminum is equal to 0.75 eV/atom.
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