The atmosphere of mars is mostly (molar mass ) under a pressure of 650 pa, which we shall assume remains constant. in many places the temperature varies from 0°c in summer to ‐100°c in winter. over the course of a martian year, what are the ranges of (a) the rms speeds of the co2 molecules and (b) the density (in mol/m3 ) of the atmosphere?

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

Steam is generated in a boiler of a cogeneration plant at 10 mpa and 450°c at a steady rate of 5 kg/s. in normal operation, steam expands in a turbine to a pressure of 0.5 mpa and is then routed to the process heater, where it supplies the process heat. steam leaves the process heater as a saturated liquid and is pumped to the boiler pressure. in this mode, no steam passes through a condenser, which operates at 20 kpa. (a) determine the power produced in the turbine and the rate at which process heat is supplied in this mode. (b) determine the power produced in the turbine and the rate of process heat supplied if only 60 percent of the steam is routed to the process heater and the remainder is expanded to the condenser pressure. (3.32 mw; 9.69 mw; 4.25 mw; 5.82 mw)

There are two routes similar in terrain; however, one route has an incline of approximately 28 degrees, and you must decide on which route to take. what is the maximum road grade that your fully loaded ecv can climb?