Me with this physics question! a 1.0 kg weight suspended from a spring is pulled to 0.50 m below its equilibrium point. if the spring has a spring constant (k) of 50.0 n/m, at what rate will the mass accelerate when it is released? a) 25 m/s² b) 6.3 m/s² c) 100 m/s² d) 3.7 m/s²

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)