(1 point) Let's take that last problem and change the time constant to 72 hr, and the heat capacity to 1ºF per thousand Btu. With all other factors the same, what will the temperature in the tank be after 12 hours? T = ºF
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In Problem 13, if a larger tank with a heat capacity of $$1^{\circ} \mathrm{F}$$ per thousand Btu and a time constant of 72 hr is used instead (with all other factors being the same|), what will be the temperature in the tank after 12 hr?
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On a mild Saturday morning while people are working inside, the furnace keeps the temperature inside the building at $$21^{\circ} \mathrm{C}$$.At noon the furnace is turned off, and the people go home. The temperature outside is a constant $$12^{\circ} \mathrm{C}$$ for the rest of the afternoon. If the time constant for the building is 3 hr, when will the temperature inside the building reach $$16^{\circ} \mathrm{C}$$? If some windows are left open and the time constant drops to 2 hr, when will the temperature inside reach $$16^{\circ} \mathrm{C}$$?
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