Translational (linear) speed is displacement divided by time, and rotational speed is:
a. the same thing.
b. angular displacement divided by time.
c. rotational acceleration divided by time.
d. the distance along the edge of a rotating disk divided by time.
e. translational speed divided by displacement.
b
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The wavelength of a periodic wave is 0.500 m. If the frequency is 400 Hz, then what is the magnitude of the k vector of the wave?
A. 12.6 
B. 14.8
C. 18.4
D. 21.0
E. 25.9
A long wire carries a current toward the east in a magnetic field that is directed due south. What is the direction of the magnetic force on the wire?
a) west b) north c) east d) vertically upward e) vertically downward
When the first law of thermodynamics, Q = ?u + W, is applied to an ideal gas that is taken through an adiabatic process,
A) ?u = 0. B) W = 0. C) Q = 0. D) it is not true that ?u = 0 or W = 0 or Q = 0.
What is the frequency of the light emitted by atomic hydrogen with m = 8 and n = 12? (The Rydberg constant is R = 1.097 × 107 m-1, c = 3.00 × 108 m/s)
A) 2.86 × 1013 Hz B) 1.43 × 1013 Hz C) 7.46 × 1013 Hz D) 8.82 × 1013 Hz E) 1.05 × 1013 Hz