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Q. A fire hose held near the ground shoots water at a speed of 6.5 m/s

At what angle(s) should the nozzle point in order that the water land 2.5 m away?

Q. When a guitar string is sounded along with a 412-Hz tuning fork, a beat frequency of 43.0 Hz is heard. When the same string is sounded along with a 422-Hz tuning fork, the beat frequency is 33.0 Hz. What is the frequency of the string?

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