A Source Emits Sound with a Frequency of 1000 Hz

question 9

Multiple Choice

A source emits sound with a frequency of 1000 Hz.It and an observer are moving toward each other, each with a speed of 100 m/s.If the speed of sound is 340 m/s, the observer hears sound with a frequency of:

• A)290 Hz
• B)540 Hz
• C)1000 Hz
• D)1800 Hz
• E)3400 Hz

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