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28. a stone is projected at a cliff of height h with an initial speed of 42.0 mls directed at angle θ0 = 60.0° above the horizontal. the stone strikes at a, 5.50 s after launching. find (a) the height h of the cliff, (b) the speed of the stone just before impact at a, and (c) the maximum height h reached above the grou
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What will a positive and a negative charge do if they are separated from each other?
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Determine the weight in newtons of a woman whose weight in pounds is 157. Also, find her mass in slu...
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