Which of the following is not an effect of our growing population's use of fossil fuels?
a
The distribution of these resources is changing
b
The amount of carbon dioxide in the atmosphere is increasing
c
The resources are now being replaced faster than they are being used
d
political conflicts occur over control of these resources
Answers: 2
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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)
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Which of the following is not an effect of our growing population's use of fossil fuels?
a
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