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Unformatted text preview: y (1) = 2 : 6. A potato comes out of an oven with an internal temperature of 212 degrees Fahreneight. Ten minutes later it has cooled to 140 degrees F. Assuming the room temperature is 70 degrees F, how long does it take to cool to 90 degrees F? 7. A cylindrical tank has radius three feet and length 10 feet. It is buried horizontally below a gasoline station (its axis of symmetry is horizonal. It is half full of gasoline weighing 47.4 pounds per cubic foot. How much work is required to pump its contents though an outlet ten feet above the center of the tank? 8. A 50 foot chain weighing 1.5 pounds per linear foot dangles from the side of a ship. How much work is required to raise it to the level of the deck. (Assume the top link of the chain is at deck level.) 1...
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 Spring '09
 CHEUNG
 Math, Calculus

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