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The Bullet Train The Shinkansen, the Japanese"bullet" train, runs at high speed from Tokyo to Nagoya. Riding onthe Shinkansen, you notice that the frequency of a crossing signalchanges markedly as you pass the crossing. As you approach thecrossing, the frequency you hear is f; as you recede from thecrossing the frequency you hear is 2f/3. What is the speed of the train?

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