1. If a force of 50N stretches a spring 0.10 m what is the spring constant?
2. A resonating glass tube closed at one end is 4.0 cm wide and 47.0 cm long. What are the frequencies of the first two harmonics for the resonating tube. The speed of sound in air at this temp is 346 m/s?
3. What is the intensity of sound waves produced by a trumpet at a distance of 1.6 m when the power output of the trumpet is 0.30 W?


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