# Science:Math Exam Resources/Courses/MATH102/December 2014/Question A 07

MATH102 December 2014

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### Question A 07

Shown in the figure below are three graphs of temperature over time, T(t), for objects satisfying Newton’s Law of Cooling, ${\displaystyle dT/dt=k(E-T)}$ with ${\displaystyle k>0}$. Which of the following is a reasonable description of the three plots?

NLCGraphs
1. The three objects were all kept in the same ambient temperature ${\displaystyle E}$.
2. The three objects had different initial temperatures.
3. The three objects had the same constant ${\displaystyle k}$.
4. The constant ${\displaystyle k}$ for Object 1 was smaller than the value of ${\displaystyle k}$ for Object 3.
5. None of the above.
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