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One summer day there are 1 5 0 students in a classroom. Each of them generates 6 0 W of heat. All the lamps produce

One summer day there are 150 students in a classroom. Each of them generates 60 W of heat. All the lamps produce 6000 W of heat. The air coming from outside is 15C, the air leaving the classroom is 25C. Calculate the flow rate of air kg/s.(WRITE TABLES AND ASSUMPTIONS)

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