So my question is if I periodically heat some glass of liquid from an arbitrary source, hence providing a driving frequency for the system that will give rise to a phase lag between the temperature of the liquid and the incoming heat from the source, how can I show that there will be a possible range of phase lags between 0 and Pi/2? How can I get a plot of phase lag vs. frequency? I have an idea about how it will look, but I'm not sure how to get there.(adsbygoogle = window.adsbygoogle || []).push({});

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# Periodic heating of a glass of liquid

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