Two pounds of carbon dioxide (co2) as an ideal gas executes a carnot power cycle while operating between thermal reservoirs at 500 and 100of. the pressures at the initial and final states of the isothermal expansion are 400 and 200 lbf/in2, respectively. the specific heat ratio is k = 1.24. determine the thermal efficiency, the work for the isothermal expansion, in btu, and the work for the adiabatic expansion, in btu.

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.