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level: 12/31/2020

Questions and Answers List

Question	Answer
The number of significant figures in 15.0 is: A. 1 B. 2 C. 3 D. 4 E. 5	C
A wave is described by y(x, t) = 0.1 sin(3x−10t), where x is in meters, y is in centimeters, and t is in seconds. The angular frequency is: A. 0.10 rad/s B. 3.0π rad/s C. 10π rad/s D. 20π rad/s E. (10 rad/s	E
A sinusoidal transverse wave is traveling on a string. Any point on the string: A. moves in the same direction as the wave B. moves in simple harmonic motion with a different frequency than that of the wave C. moves in simple harmonic motion with the same angular frequency as the wave D. moves in uniform circular motion with a different angular speed than the wave E. moves in uniform circular motion with the same angular speed as the wave	C
Which of the following types of electromagnetic radiation travels at the greatest speed in vacuum? A. Radio waves B. Visible light C. X rays D. Gamma rays E. All of these travel at the same speed	E
The focal length of a spherical mirror is N times its radius of curvature where N is: A. 1/4 B. 1/2 C. 1 D. 2 E. 4	B