Kiku and Alex are wearing rollerskates. Kiku is right behind Alex, and both skaters are standing still. Alex weighs more than Kiku. If Kiku gives Alex a forward push, which of the following will be true after the push? Assume that this is a closed system and friction can be ignored. A.
Kiku's momentum and Alex's momentum will add up to zero.
B.
Kiku's velocity and Alex's velocity will add up to zero.
C.
Alex's speed will be greater than Kiku's speed.
D.
Alex's momentum will be greater than Kiku's momentum.

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)

Could someone me find the answer to this problem.

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