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As a 2.0 kg object moves along the x axis, the only force acting on it is given by Fx= (3x squared + 2x) Newtons where x is measured in m. If the object moves from x=1.0m to x=3.0m, what is its change in kinetic energy?
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Describe the effect on speed, frequency, and wavelength of a sound traveling from warm to cold air. (hint:cold air is more dense than warm air).
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