Appendix A Principle of Attenuation Energy Storage Consider a block with mass m, as shown in Figure A-l(a), having an average (steady) plus variable (oscillating) energy source, Qa + Qv(t), connected to steady fluid temperature, Tf, through conductance, Ko = 1/Rq, and where the (small) loss, Ql, is regarded as constant for this illustration. An energy balance on this mass results in
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