What is the skiers speed on the two level stretches

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Q. A skier starts down a frictionless 32° slope. After a vertical drop of 28 m, the slope temporarily levels out, and after that drops at 20° an additional 41 m vertically before levelling out again. What is the skier's speed on the two level stretches?

Q. Iodine-131 has a half-life of 8 days. A 2-gram sample of at first pure iodine-131 is stored for 32 days. How various grams of iodine-131 remain in the sample afterwards?

Reference no: EM1386631

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