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Q.Two strings are adjusted to vibrate at exactly 225 Hz. Then the tension in one string is increased slightly. Afterward, three beats per second are heard when the strings vibrate at the same time. What is the new frequency of the string that was tightened.

Q. A rocket moves upward, starting from rest with an acceleration of 29.1 m/s2 for 4.54 s. It runs out of fuel at the end of the 4.54 s but does not stop. How high does it rise above the ground?

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