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Q. One mass, m1 = 215g, of an ideal Atwood machine rests on the floor 1.10 m below the other mass, m2 = 255g. 1) If the masses are released from rest, how long does it take m2 to reach the floor? 2) How high will mass m1 ascend from the floor?

Q. Chromium is produced by reacting with its oxide with aluminium. If 304 g of Cr2O3 and 108 g of Al completely react to form 204 g of Al2O3 how many grams of Cr are formed?

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