Do you have three temperatures available to operate a carnot machine, 500 * c, 600*c and 700 * c. calculate all the possible efficiencies to determine which is the combination that produces the maximum efficiency.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

Avector of magnitude 2 cannot be added to a vector of magnitude 3 so that the magnitude of the resultant is a. zero b. 1 c. 3 d. 5 e. 7

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.