On a cold winter day, the outside temperature is -20C and the inside temperature is maintained at 20C. There is a net heat flow to the outside through the walls, roof, etc., of 25 kW.
What is the rate of increase of the entropy of the universe as a result of this? A) 13 W/K
B) 25 W/K
C) 85 W/K
D) 99 W/K
E) 0 W/K
Question 2
A mass is attached to a spring. It oscillates at a frequency of 4.0 Hz when displaced a distance of 2.0 cm from equilibrium and released. What is the maximum velocity attained by the mass?
A) 0.08 m/s
B) 0.32 m/s
C) 0.02 m/s
D) 0.40 m/s
E) 0.50 m/s
A severe food shortage occurred in the Netherlands during the “Hunger Winter” of 1944–1945.
A typical temperature sensor circuit.
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