Choose the one alternative that best completes the statement or answers the question. -A police car has an 800-Hz siren. It is traveling at 35.0 m/s on a day when the

Choose the one alternative that best completes the statement or answers the question.
-A police car has an 800-Hz siren. It is traveling at 35.0 m/s on a day when the speed of sound through air is 340 m/s. The car approaches and passes an observer who is standing along the
Roadside. What change of frequency does the observer hear?
A) 166 Hz
B) 249 Hz
C) 82 HZ
D) 0 Hz

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