As a budding mechanical engineer, you are called upon to design a carnot engine that has 2.00 molof a monatomic ideal gas as its working substance and operates from a high-temperature reservoir at 500 ∘c. the engine is to lift a 15.0-kg weight 2.00 m per cycle, using 500 j of heat input. the gas in the engine chamber can have a minimum volume of 5.00 l during the cycle. a)what must be the temperature of the cold reservoir? b)what is the thermal efficiency of the engine? c)how much heat energy does this engine waste per cycle? d)what is the maximum pressure that the gas chamber will have to withstand?

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg. a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg.m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?