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Q. Suppose an automobile has 2000 J of kinetic energy. When it moves at twice the speed, what will be its kinetic energy? What's its kinetic energy at three times the speed? (8.5) 8000 J; 18,000 J

What will be the kinetic energy of an arrow having potential energy of 50 J after it is shot from a bow.

Q. one closed organ pipe has a length of 2.35m.

A. What is the frequency of the note played by this pipe?

B. When a second pipe is played at the same time, a 1.50 Hz beat note is heard. By how much is the second pipe too long?

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