Question

Even when shut down after a period of normal use, a large commercial nuclear reactor produces heat at the rate of 162 MW by the radioactive decay of fission products. This causes a rapid increase in temperature if the cooling system fails. Answers are NOT 12650 and 0.181 for #1.

Even when shut down after a period of normal use, a large commercial nuclear reactor produces heat at the rate of 162 MW by the radioactive decay of fission products. This causes a rapid increase in temperature if the cooling system fails. (a) Calculate the rate of temperature increase in degrees Celsius per second (°C/s), if the mass of the reactor core is 1.60 x 105 kg and has an average specific heat of 0.0800 kcal/(kg - °C) °C/s (b) How long would it take to obtain a temperature increase of 2300°C? (The initial rate of temperature increase would be greater than calculated here, because the heat is concentrated in a smaller mass, but later, the temperature increase would slow because the 5 x 105-kg steel containment vessel would begin to be heated, too.) Additional Materials EReading Show My Work (optional) -/1 points osColPhys2016 14.2.WA.005 My Notes +Ask Your Teacher Rubbing your hands together warms them by converting work into thermal energy. If a woman rubs her hands back and forth for a total of 25 rubs a distance of 7.50 cm each and with a frictional force averaging 51.3 N, what is the temperature increase? The mass of tissue warmed is only 0.100 kg, mostly in the palms and fingers. The specific heat of the tissue is 3500 J/(kg °C) °C

Answer 1

Giua 102 Mw 12 x/ Wat Bo X418 T/k-c c=00800 K I-c Now P - mc AT AT- 162X106 AT= 16xlo5g0x413 3.026 c/s AT Pent-e) reuh 2300c time faken t 23o AT t 2300 3 02-4 t 760 Seconds 2 Gion do.0750 m N=25 m0.100 3 c35/ S-51-3 N Work deme b heat MCAT trichon mcAT AT=25XS12X0.0750 10 x350 AT= 0.275 C