A 1200-kg flywheel with a radius of gyration of 400 mm has its speed reduced from 5000 to 3000 rev/min during a 2-min interval. Calculate the average power supplied by the flywheel. Express your answer both in kilowatts and in horsepower.
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An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air is at 95 kPa and and 750 kJ/kg of heat is transferred to air during the constant-volume heat-addition process. Taking into account the variation of specific heats with temperature, determine (a) the pressure and temperature at the end of the heat-addition process. (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle.
A cylindrical part of diameter dis loaded by an axial force P. This causes a stress of P/A, where . If the load is known with an uncertainty of percent, the diameter is known within percent (tolerances), and the stress that causes failure (strength) is known within percent, determine the minimum design factor that will guarantee that the part will not fail.