The temperature difference between the inside and the outside of a home on a col

Question

The temperature difference between the inside and the outside of a home on a cold winter day is 57.0°pF (a) Express this difference on the Celsius scale. 13.9 Your response differs from the correct answer by more than 10%. Double check your calculations.°C (b) Express this difference on the Kelvin scale. 287 Your response differs from the correct answer by more than 100%. K Need Help? Talk to a Tutor Submit Answer Save Progress 4.55/9.09 points | Previous Answers SerCP9 10 P015. My Notes Ask A brass ring of diameter 10.00 cm at 14.6"C is heated and slipped over an aluminum rod of diameter 10.01 cm at 14.6°C. Assume the average coefficients of linear expansion are constant. (a) To what temperature must the combination be cooled to separate the two metals? oC

Explanation / Answer

The catch here is they're not asking for a specific temperature; only the difference in temperature. The ? is improperly stated; a temperature DIFFERENCE cannot be expressed as XX.X°F; it should be F°, a seemingly small but in this case crucial difference. Since C° are equal to 9/5 F°, a 57F° change is equal to 57*(5/9) = 31.67 C°

b) Since the K scale is the same as the C scale with a different point for 0.0°, the answer is the same for the K scale.

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