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2. On a hot summer day, with a temperature of 30 degrees celsius, a police car and motorcycle are driving away from each other. The

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2. On a hot summer day, with a temperature of 30 degrees celsius, a police car and motorcycle are driving away from each other. The police car has a siren with a frequency of 1600 Hz. The police car is traveling 25 m/s and the motorcycle is traveling at 20 m/s. What is the observed frequency of the siren? [4]

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