A Car Moving at 35 M/s Approaches a Stationary Whistle

question 14

Multiple Choice

A car moving at 35 m/s approaches a stationary whistle that emits a 220 Hz sound. The speed of sound is 343 m/s. What is the frequency of sound heard by the driver of the car?

• A)198 Hz
• B)220 Hz
• C)245 Hz
• D)282 Hz
• E)340 Hz

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A U.S. Government agency responsible for collecting, analyzing, and distributing energy information to promote sound policymaking, efficient markets, and public understanding of energy and its interaction with the economy and the environment.