In Each of the Following Two Situations a Source Emits

question 4

Multiple Choice

In each of the following two situations a source emits sound with a frequency of 1000 Hz.In situation I the source is moving at 100 m/s toward an observer at rest.In situation II the observer is moving at 100 m/s toward the source, which is stationary.The speed of sound is 340 m/s.The frequencies heard by the observers in the two situations are:

• A)I: 1417 Hz; II: 1294 Hz
• B)I: 1417 Hz; II: 1417 Hz
• C)I: 1294 Hz; II: 1294 Hz
• D)I: 773 Hz; II: 706 Hz
• E)I: 773 Hz; II: 773 Hz

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