The oscillation of rod OA about O is defined by the relation θ 5 (3yπ)(sin πt), where θ and t are expressed in radians and seconds, respectively. Collar B slides along the rod so that its distance from O is r 5 6(1 2 e22t ) where r and t are expressed in inches and seconds, respectively. When t 5 1 s, determine (a) the velocity of the collar, (b) the acceleration of the collar, (c) the acceleration of the collar relative to the ro

Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)