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q1 at a factory a noon whistle is sounding with a

Q1. At a factory, a noon whistle is sounding with a frequency of 491 Hz. As a car travelling at 78 km/h approaches the factory, the driver hears the whistle at frequency fi. After driving past the factory, the driver hears frequency ff. What is the change in frequency ff - fi heard by driver?

Q2. A(n) 229 g object is attached to a spring and executes simple harmonic motion with a period of .347 s. The total energy of the system is 3.2 J. Find the amplitude of motion.

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