A T-type thermocouple has an expected error of ± 1.0 °C or 0.75 % of the reading, with a negligible resolution error. The multimeter we have can measure from 0-320 mV ± 1.2%, with a resolution of 100 μV. At 200 °C the reading expected is 9.288 mV. What is the design stage uncertainty of this system?

To save energy, the air supply to a 2000 ft office has been shut off overnight and the room temperature has dropped to 40°f. in the morning, the thermostat is reset to 70°f and warm air at 120 f begins to flov in at 200ft'/min. the air is well mixed within the room, and an equal mass flow of air at room temperature (changing with time) is withdrawn through a return duct. the air pressure is nearly 1 atm everywhere. ignoring heat transfer with the surroundings and kinetic and potential energy effects, estimate how long it takes for the room temperature to reach 70°f. plot the room temperature as a function of time.