Football player a has a mass of 210 pounds and is running at a rate of 5.0mi/hr. he collides with player b. player b has a mass of 190 pounds and is running in the same direction at 3.0 mi/hr. which of the following statements is true?

a.) the momentum before the collision is equal to the momentum after the collision.
b.) the momentum before the collision is greater than the momentum after the collision.
c.) the momentum before the collision is less than the momentum after the collision.

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)