A 25,000 kg subway train initially traveling at 15.5 m/sslows to a stop in a station and then stays there long enough for itsbrakes to cool. The station’s dimensions are 65.0 m long by 20.0 mwide by 12.0 m high. Assuming all the work done by the brakes in stoppingthe train is transferred as heat uniformly to all the air in the station,by how much does the air temperature in the station rise? Take the densityof the air to be 1.20 kg>m3 and its specific heat to be 1020 J /kg . K.
A 25,000 kg subway train initially traveling at 15.5 m/sslows to a stop in a station and then stays there long enough for itsbrakes to cool. The station’s dimensions are 65.0 m long by 20.0 mwide by 12.0 m high. Assuming all the work done by the brakes in stoppingthe train is transferred as heat uniformly to all the air in the station,by how much does the air temperature in the station rise? Take the densityof the air to be 1.20 kg>m3 and its specific heat to be 1020 J /kg . K.
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A 25,000 kg subway train initially traveling at 15.5 m/s
slows to a stop in a station and then stays there long enough for its
brakes to cool. The station’s dimensions are 65.0 m long by 20.0 m
wide by 12.0 m high. Assuming all the work done by the brakes in stopping
the train is transferred as heat uniformly to all the air in the station,
by how much does the air temperature in the station rise? Take the density
of the air to be 1.20 kg>m3 and its specific heat to be 1020 J /kg . K.
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