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Q. select the quantity that has changed(velocity or speed) for a car that travels north at 88 km/h and then turns east while continuing to move at 88 km/h. Explain your answer

Q. A guitar string is supposed to vibrate at 190 Hz, but is measured to actually vibrate at 206 Hz. By what percentage should the tension in the string be changed to get the frequency to the correct value?

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