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28-03-2024
Physics

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A technician takes the following readings while checking the operation of an electric furnace with 2 heat strips: 220 volts, 36 amps, 70°F return air temperature, and 120°F supply air temperature. What is the airflow through the furnace?
a) 560 CFM
b) 680 CFM
c) 720 CFM
d) 840 CFM

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