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s whistle the pitchis high as it approaches you When it goes past and away from you the pitch is lowerSound waves from the whistle are compressed as the train approaches and stretched outas the train recedes from you Figure 2 and Figure 3 You hear the short compressedwavelengths as a higher frequency and the stretched longer wavelengths as a lower frequencyUnit 3 Lab 3 The Doppler Effect Teacher V
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