As a system loses its ability to do useful work
A) energy increases.
B) entropy decreases.
C) energy decreases.
D) entropy increases.
E) entropy remains constant.
Question 2Which of the following speeds is greatest?
A) 10 km/h
B) 10 m/s
C) 10 ft/s
D) 10 mi/h
E) 10 yards/s
Question 3Increasing the mass m of a mass-and-spring system causes what kind of change on the resonant frequency of the system?
A) The frequency increases.
B) The frequency decreases.
C) There is no change in the frequency.
D) The frequency increases if the ratio k/m is greater than or equal to 1 and decreases if the ratio k/m is less than 1.
E) The frequency increases if the ratio k/m is less than or equal to 1 and decreases if the ratio k/m is greater than 1.
Question 4Which of the following are in order of decreasing temperature?
A) O9, F2, F7, G2, K0
B) K0, G2, F7, F2, O9
C) F7, F2, O9, K0, G2
D) O9, F7, F2, G2, K0
Question 5A wooden block slides directly down an inclined plane, at a constant velocity of 6.0 m/s. How large is the coefficient of kinetic friction, k, if the plane makes an angle of 25. with the horizontal?
A) 0.47
B) 0.91
C) 1.2
D) 0.42
E) 0.37
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