A rotating platform of radius r = 2.7 cm starts from rest and accelerates with uniform angular acceleration α = 38 rad/s2. randomized variables r = 2.7 cm α = 38 rad/s2 (b) Write an expression for the time at which the magnitudes of the centripetal and tangential accelerations at the edge will be equal

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room 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. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)