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Q. A tuning fork with a frequency of 356 Hz is found to cause resonance in a closed column of air at 41.0cm and at 65 cm. Find the velocity of the sound produced by the tuning fork.

Q. A circular curve of highway is designed for traffic moving at 83 km/h. Assume the traffic consists of cars without negative lift. (a) If the radius of the curve is 280 m, what is the correct angle of banking of the road? (b) If the curve were not banked, what would be the minimum coefficient of friction between tires and road that would keep traffic from skidding out of the turn when traveling at 83 km/h?

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