1.

The passenger section of a jet airliner has the shape of a cylindrical tube with a length of 35.0 m and an inner radius of 2.50 m. Its wall are lined with an insulating material 6.00 cm in thickness and having a thermal conductivity of 4.00xx10^(-5) cal/s cm ""^(0)C. A heater must maintain the interior temperature at 25.0^(0)C while the outside temperature is at -35.0^(0)C. What power must be supplied to the heater if this temperature difference is to be maintained ?

Answer»

9.32 kW
8.32 kW
7.52 kW
10.41 kW

Answer :A


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