Physical chemists tell us that a typical chemical bond has a force constant in the range of k = 500 Nm. Assume that we have a spring with the same force constant, and that a 1.00 pound weight is attached. How far will the spring stretch? (Hint: need to introduce acceleration due to gravity and balance downward and upward forces)

Abrayton cycle operates with a regenerator on the air-standard with properties evaluated at 400 k. the tem- perature of the air entering the compressor is 350k while the temperature of the air exiting the compressor is 600 k. the temperature of the air entering the turbine is 1600 k. the overall cycle produced 600 kj/kg of net work out. assuming a regenerator effectiveness of 0.8, what is the temperature of the air before heat addition (combustion)? draw this process on a t - s diagram