As a coffee enthusiast you wish to keep your coffee as hot as possible for as...

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Physics

As a coffee enthusiast you wish to keep your coffee as hot aspossible for as long as possible. You wish to find the rate of heatloss of a typical coffee mug. Assume the mug to be a cylinder whichhas a lid made out of the same material as the rest of thecylinder, and the thickness of the walls is 1.34 cm. If the coffeein the mug is 79.2 Â°C and the room temperature is 24.0 Â°C how muchmore heat does the mug lose through conduction than from radiatedenergy. See the hint below for important constants.
Assume that the thermal conductivity of all sides of the mug is0.850 W/mÂ·C, that the mug has an emissivity of 0.760 and theStefan-Boltzmann Constant is 5.67 Ã— 10-8 W/m2Â·K4. Remember toproperly convert all units and to include all surfaces of themug.

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3.8 Ratings (609 Votes)

Given coffee mug with thermal conductiviy k 0850 Wm0C mug of cylinder of thickness is t 134102 m the temperature of the coffee is T2 792 0C T1 See Answer

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