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Chapter 16: Q10CQ (page 588)
Give an example of a damped harmonic oscillator. (They are more common than undamped or simple harmonic oscillators.)
A hanging simple pendulum in the air is an example of a damped harmonic oscillator.
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Why are soldiers in general ordered to 鈥渞oute step鈥� (walk out of step) across a bridge?
By how much leeway (both percentage and mass) would you have in the selection of the mass of the object in the previous problem if you did not wish the new period to be greater than 2.01 s or less than 1.99 s?
What is the difference between propagation speed and the frequency of a wave? Does one or both affect wavelength? If so, how?
As you pass a freight truck with a trailer on a highway, you notice that its trailer is bouncing up and down slowly. Is it more likely that the trailer is heavily loaded or nearly empty? Explain your answer.
(a) A photovoltaic array of (solar cells) is 10.0% efficient in gathering solar energy and converting it to electricity. If the average intensity of sunlight on one day is 700 W/m2, what area should your array have to gather energy at the rate of 100W? (b) What is the maximum cost of the array if it must pay for itself in two years of operation averaging 10.0 hr per day? Assume that it earns money at the rate of 9.00C per kilowatt-hour.
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