Two Golf Carts Have Horns That Emit Sound with a Frequency

question 3

Multiple Choice

Two golf carts have horns that emit sound with a frequency of 394 Hz. The golf carts are traveling toward one another, each traveling with a speed of 9.5 m/s with respect to the ground. If one of the drivers sounds her horn, what frequency does the other driver hear? The speed of sound at the golf course is 345 m/s.

• A)378 Hz
• B)394 Hz
• C)408 Hz
• D)416 Hz
• E)424 Hz

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