A rubber ball is dropped from a distance of 140 m above
A rubber ball is dropped from a distance of 1.40 m above ground and bounces to 60% of its original height. If the average force exerted on the ball is ten times its weight, how long is the ball in contact with the ground?
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permanganate ion will oxidize cr3 in acidic solution to produce mn2 and what other product the answer is dichromate but
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a rubber ball is dropped from a distance of 140 m above ground and bounces to 60 of its original height if the average
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a compound of chromium and oxygen contains 189 g of the nonmetal and 411 g of the metal how many grams of chromium are
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