A brass rod, 75.0 cm long and having a cross-sectional area of 2.50 cm2, conducts heat from a large furnace at 375°C into a very large cold water bath at 10.0°C without losing any heat at the lateral surface of the rod
Steady state has been established, and the thermal conductivity of brass is 109 W/m?K. The rate at which the entropy of the system (furnace plus water) is changing is closest to
A) 6.74 × 10-2 W/K.
B) 2.64 × 10-2 W/K.
C) 2.05 × 10-2 W/K.
D) 3.54 × 10-2 W/K.
E) 4.69 × 10-2 W/K.
B
You might also like to view...
A square bronze fin, 30 cm wide. 1 cm thick, and 5 cm long is surrounded by air at 27ºC having a convective heat transfer coefficient of 300 W/m^2 ?K. Determine the fin tip temperature, the fin heat transfer, and the fin efficiency.
What will be an ideal response?
Some light switches that glow in the dark after the lights are turned off employ
A) fluorescence. B) resonance. C) incandescence. D) all of the above E) none of the above
If the velocity of an object is zero, then that object cannot be accelerating
A) True B) False
How much mass is lost during a reaction in which 1.7 × 108 MeV of energy is released?
A) 1.8 × 10-8 kg B) 5.7 × 10-9 kg C) 1.9 × 10-17 kg D) 3.0 × 10-22 kg E) 6.2 × 10-28 kg