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Q. Two loudspeakers are vibrating in phase. They are set up and point C is located. Assume the speed of sound is 342 m/s. The speakers play the same tone. What is the smallest frequency that will produce destructive interference at point C?

Q. A 30 g car rolls from a hill 12 cm high and it traveling at 154 cm/s as it travels along a 275 cm horizontil track.What is the momentum of the car?

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