Could you please solve problem 2.25?
Thank you very much.
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Fundamentals of Engineering
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2.25 Air contained within a piston-cylinder assembly undergoes three processes in series:
Process 1-2: Compression during which the pressure-volume relationship is pV = constant from p1 = 10 lbf/in^2, V1 = 4 ft^3 to p2 = 50 lbf/in^2.
Process 2-3: Constant volume from state 2 to state 3 where p = 10 lbf/in^2.
Process 3-1: Constant pressure expansion to the initial state.
And the power transmitted is 7 kW. Determine the net force applied by the belt on the pulley, in kN, and the rotational speed of the driveshaft, in RPM.
2.27 W A 10-V battery supplies a constant current of 0.5 amp to a resistance for 30 min. Answer provided to the heater, in kW, and the total amount of energy supplied to the heater by electrical work, in kW-h. If electric power is valued at $0.08/kW-h, determine the cost of operation for one day.
Solution 2.29 A car magazine article states that the power W delivered by an automobile engine, in hp, is calculated by multiplying the torque J, in ft-lbf, by the rotational speed of the driveshaft, in RPM, and dividing by a constant Ta. W = C. What is the value and units of the constant C? What percentage of the developed power is transferred to the driveshaft? What accounts for the difference in power? Does an engine this size meet your transportation needs? Comment. Answer D.
Solution 2.31 Figure P2.31 shows an object whose mass is 5 lb attached to a rope wound around a pulley. The radius of the pulley is 3 in. If the mass falls at a velocity of 4 ft/s, determine the angular velocity of the pulley when the mass has fallen 2 ft.
