The steel compression ring for the piston of an automobile engine has a mass of 40 g. the ring is irradiated with neutrons until it has an activity of 2.5 ci of (t = 44.529 d) distributed uniformly throughout. the ring is installed in an engine and removed 30 days later. if the 22 l of crankcase oil has an average activity due to of 0.023 d/s per cubic centimeter, what mass (g) of steel was worn off the piston ring?

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)

How will the system respond to a temperature increase?

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