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quiz6

# quiz6 - Exam Name MULTIPLE CHOICE Choose the one...

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Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Consider a light wave and a sound wave with the same wave length. Which has the higher frequency? A) sound B) light C) they have the same frequency 1) 2) The sound intensity level 3.25m from a source is 58.9dB. If power drops by a factor of 0.0170, what is the new intensity level (in dB)? A) 44.1dB B) 41.2dB C) 47.0dB D) 38.3dB 2) 3) A 0.663 meter string is clamped at both ends. If the lowest standing frequency in the string is 326Hz, what is the wave speed? A) 816m/s B) 432m/s C) 657m/s D) 536m/s 3) 4) The mach angle for a supersonic jet is 16.89 e Assuming that the speed of sound is 343.0 m/s, how fast is the jet moving? A) 1181 m/s B) 1098 m/s C) 1063 m/s D) 1134 m/s 4) 5) The siren of an ambulance wails at 1662 Hz when the ambulance is stationary. What frequency will you hear after this ambulance passes you while traveling at 33.60 m/s? The speed of sound under the prevailing conditions is 343.0 m/s. A) 1745 Hz

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