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Chapter 16: Problem 21
A sick child's temperature reads 39.1 on a Celsius thermometer. What's the temperature in Fahrenheit?
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Your young niece complains that her cocoa, at \(90^{\circ} \mathrm{C},\) is too hot. You pour 2 oz of milk at \(3^{\circ} \mathrm{C}\) into the 6 oz of cocoa. Assuming milk and cocoa have the same specific heat as water, what's the cocoa's new temperature?
An electric stove burner has surface area \(325 \mathrm{cm}^{2}\) and emissivity \(e=1 .\) The burner consumes \(1500 \mathrm{W}\) and is at \(900 \mathrm{K} .\) If room temperature is \(300 \mathrm{K},\) what fraction of the burner's heat loss is from radiation?
What method of energy transfer dominates in baking? In broiling?
Fiberglass insulation for attics is available in 12 -inch thickness. Its \(\mathcal{R}\) -factor is a. 38 b. 76 c. 29
A cylindrical log \(15 \mathrm{cm}\) in diameter and \(65 \mathrm{cm}\) long is glowing red hot in a fireplace. The log's emissivity is essentially 1 If it's emitting radiation at the rate of \(34 \mathrm{kW}\), what's its temperature?
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