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Q. Two point charges are separated by 6 cm. THe attractive force between them is 20 N. What is the force between them when they are separated by 9 cm? What is the equation used to arrive at this answer?

Q. An air-track glider attached to a spring oscillates between the 14.0 {rm cm} mark and the 62.0 {rm cm} mark on the track. The glider completes 10.0 oscillations in 33.0 {rm s}. What are the amplitude, and maximum speed of the glider?

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