## Question

###### Early Monday moring the temperature in the lecture hall has fallen to 398F, the same as the temperature outside At7.00 AM the janitor turns on the furace with thethermostat set at 75'F The time constant for the building is K = 3hr and that for the building along with its heating system is hr Assuming that the outside temperature remains constant, what will be the temperature inside the ecture hall at 8.30 AM When will the temperature inside the hall reach 72*F?

Early Monday moring the temperature in the lecture hall has fallen to 398F, the same as the temperature outside At7.00 AM the janitor turns on the furace with the thermostat set at 75'F The time constant for the building is K = 3hr and that for the building along with its heating system is hr Assuming that the outside temperature remains constant, what will be the temperature inside the ecture hall at 8.30 AM When will the temperature inside the hall reach 72*F?

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