A car drives north at 46 for 10 and then turns east and, Ask an Expert

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Q. A pair of in-phase stereo speakers is placed side by side, 0.9 apart. You stand directly in front of one of the speakers, 1 from the speaker. What is the lowest frequency that would produce constructive interference at your location?

Q. A car drives north at 46 for 10 and then turns east and goes 5 at 60. At last, it goes southwest at 30 for 6.0. What is the average velocity?

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