The potential energy of a pendulum is greatest
a. when its potential energy is least.
b. at the top of its swing.
c. at the bottom of its swing.
d. when its total energy is greatest.
b
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Standing Sound Waves: A standing wave of the third overtone is induced in a 1.2-m pipe that is open at one end and closed at the other end. The speed of sound in the pipe is 340 m/s. (a) How many antinodes are there in the standing wave pattern?(b) What is the frequency of the sound produced by the pipe in this situation?
Fill in the blank(s) with the appropriate word(s).
A baseball leaves the bat with a speed of 47 m/s and an angle of 45° above the horizontal. A 5.0-m-high fence is located at a horizontal distance of 137 m from the point where the ball is struck. Assuming the ball leaves the bat 1.0 m above ground level, by how much does the ball clear the fence?
a. 59.7 m b. 47.7 m c. 49.7 m d. 121 m
Which moon of Neptune has a thin atmosphere and frosty polar caps?
a. Triton b. Titan c. Io d. Charon
Nuclear Binding Energy: The neutral 
Al atom has a mass of 26.981539 u; a neutral hydrogen atom has a mass of 1.007825 u; a neutron has a mass of 1.008665 u; and a proton has a mass of 1.007277 u. What is the binding energy per nucleon for 
Al? (1 u = 931.5 MeV/c2)
A. 8.3 MeV B. 6.7 MeV C. 5.4 MeV D. 3.4 MeV E. 2.8 MeV