A fatal flaw with Ptolemy's model is its inability to predict the observed phases of:
A) the Sun during an eclipse.
B) the Moon in its monthly cycle.
C) Mercury and Venus.
D) Mars and Jupiter.
E) Jupiter and Saturn.
C
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A 2000 kg car accelerates up to a velocity of 40 m/s in 5.0 seconds. The brakes are applied, and the car is brought to a stop. The work done by the friction in the brakes is
A. 
B. 
C. 
D. 
E. 
If the planet Jupiter underwent gravitational collapse, its rate of rotation about its axis would
A) decrease. B) increase. C) stay the same. D) need more information
What is meant by neutrino oscillations?
a. oscillating movement of neutrinos b. one neutrino type (e.g., muon neutrinos) changing into another (e.g., tau neutrinos) c. random changes in mass of neutrinos d. none of the above
The net force on a moving object suddenly becomes zero. The object then
A. stops abruptly. B. stops during a short time interval. C. changes direction. D. continues at constant velocity. E. slows down gradually.