A (950-mathrm{kg}) car uses an engine that operates on a Brayton cycle for which the pressure ratio
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A \(950-\mathrm{kg}\) car uses an engine that operates on a Brayton cycle for which the pressure ratio is 8 and the working substance is helium (He) gas. During each cycle, \(25 \%\) of the work done by the engine is used to overcome friction. If the engine must accelerate the car from rest to \(30 \mathrm{~m} / \mathrm{s}\), how much energy must be transferred thermally to the engine?
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