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Q1. A physics student drops a vibrating 439Hz tuning fork down elevator shaft of a tall building. The temperature in the shaft is 20 °C. While the student hears a frequency of 447 Hz, how far has tuning fork fallen?

Q2. A ship sets out to sail to the point 158 km due north. An unexpected storm blows the ship to a point 134 km due east of its starting point. (a) How far (in km) and (b) in what direction (as an angle from due east, where north of east is a positive angle) should it now sail to reach its original destination?

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