One end of a copper rod is in thermal contact with a hot reservoir at T = 500 K and the other end is in thermal contact with a cooler reservoir at T = 300 K. Find the entropy change of each reservoir, and the total entropy change, when 8000 J of heat energy are conducted from one end of the rod to the other with no change in the temperature distribution in the rod
?16.0 J/K, +26.7 J/K, +10.7 J/K
You might also like to view...
A simple pendulum and a mass oscillating on an ideal spring both have period T in an elevator at rest. If the elevator now moves downward at a uniform 2 m/s, what is true about the periods of these two systems?
A) Both periods would remain the same. B) Both periods would increase. C) Both periods would decrease. D) The period of the pendulum would increase but the period of the spring would stay the same. E) The period of the pendulum would decrease but the period of the spring would stay the same.
Total Internal Reflection: A tank holds a layer of oil, of thickness To = 1.43 m, that floats on a layer of syrup of thickness Ts = 0.640 m, as shown in the figure. Both liquids are clear and do not mix together. A light ray, originating at the bottom of the tank at point P, crosses the oil-syrup interface at a point 0.900 m from the axis. The ray continues and arrives at the oil-air interface, 2.00 m to the right of P and at the critical angle. What is the index of refraction of the oil?
A. 1.64 B. 1.62 C. 1.60 D. 1.66 E. 1.68
Which of these spacecraft went into orbit about Saturn in July 2004?
A) Galileo B) New Horizons C) Cassini D) Voyager 2 E) NEAR-Shoemaker
Einstein's famous equation E = mc2 is a statement of
a. time dilation. b. length contraction. c. the equivalence of mass and energy. d. the principle of relativity. e. none of the above.