A sound wave in a metal bar is an example of a longitudinal wave
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The Miller experiment created synthetic DNA
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Doppler Effect: You are moving at 120 km/h toward a stationary train. The train blows its 0.400-kHz whistle. Take the speed of sound to be 340 m/s. What frequency do you hear?
A. 444 Hz B. 439 Hz C. 364 Hz D. 361 Hz
Suppose a 0.30-kg mass on a spring that has been compressed 0.20 m has elastic potential energy of 1.0 J. How much further must the spring be compressed to triple the elastic potential energy?
a. 0.35 m c. 0.10 m b. 0.15 m d. 0.05 m
The basic physical principal principle that explains the operation of rocket engines is
A) the atomic hypothesis. B) the law of force pairs. C) Galileo's principle of falling. D) the law of inertia. E) Actually, rockets are unexplainable.