Which of the following is not a fossil fuel?
a. Uranium
b. Oil
c. Coal
d. Gas
a
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Graphical Interpretation of Work: A force acts on an object, causing it to move parallel to the force. The graph in the figure shows this force as a function of the position of the object. How much work does the force do as the object moves from 6 m to 12 m?
A. 20 J B. 30 J C. 0 J D. 40 J E. 70 J
Nuclear Binding Energy: Radium-226 decays into radon-222 plus an alpha particle. The relevant masses are
How much energy is released in this process? (1 u = 931.5 MeV/c2)
A. 4.24 MeV B. 3.76 MeV C. 4.87 MeV D. 5.05 MeV E. 5.39 MeV
As a hiker descends a hill, the work done by gravity on the hiker is
A. positive and depends on the path taken. B. negative and depends on the path taken. C. positive and independent of the path taken. D. negative and independent of the path taken.
The Metonic cycle is the
A) 18-year, 11-day period over which the pattern of eclipses repeats. B) period between successive Easters. C) 12-month period of a lunar calendar. D) 19-year period over which the lunar phases occur on about the same dates. E) 29 1/2-day period of the lunar cycle.