Sound waves can interfere with one another so that no sound results
A) True
B) False
C) Either, depending on the air temperature.
Answer: A
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A 4.00 kg mass is moving in a circular path of radius 2.50 m with a constant angular velocity of 5.00 rad/sec. The centripetal force on the mass is
A. 250 N. B. 185 N. C. 153 N. D. 107 N. E. 94.0 N.
A 5,000 kg satellite is orbiting the Earth in a circular path. The height of the satellite above the surface of the Earth is 800 km. The time it takes for the satellite to travel around the Earth is 
A. 0.750 hours. B. 0.950 hours. C. 1.25 hours. D. 1.68 hours. E. 2.01 hours.
Wave period is the reciprocal of
a. amplitude. b. frequency. c. wave velocity. d. all of these.