A ship’s boiler steam comes out at 435 K and pushes through the system, exiting into the condenser, which is kept at 176 K by circulating seawater. What is the ideal efficiency of the ship’s boiler rounded to the nearest thousandth?

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?