Choose the One Alternative That Best Completes the Statement or Answers

question 140

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
-A cup of coffee is heated to $194 ^ { \circ }$ and is then allowed to cool in a room whose air temperature is $72 ^ { \circ }$ . After 11 minutes, the temperature of the cup of coffee is $140 ^ { \circ }$ . Find the time needed for the coffee to cool to a temperature of $102 ^ { \circ }$ . Assume the cooling follows Newton's Law of Cooling:
$$\mathrm { U } = \mathrm { T } + \left( \mathrm { U } _ { \mathrm { O } } - \mathrm { T } \right) \mathrm { e } ^ { \mathrm { kt } } \text {. }$$
(Round your answer to one decimal place.)

• A) \(15.1\) minutes
• B) \(29.7\) minutes
• C) \(41.1\) minutes
• D) \(26.4\) minutes

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A waxy, fat-like substance found in all cells of the body, necessary for making hormones, vitamin D, and substances that help digest foods.

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A blood vessel that carries oxygenated blood away from the heart to the body's tissues.