qu.1.topic=Modes of Heat Transfer@

qu.1.1.question=<p>
	A blacksmith works an iron sword in a 1100 °C &nbsp;forge. He throws it in a bath of constantly moving cold water (5°C) to cool it down. How hot will the sword be after 3<span style="font-family:times new roman,times,serif;">τ</span> seconds, where&nbsp;<span style="font-family:times new roman,times,serif;">τ</span> is the time constant?</p>
<p>
	&nbsp;</p>@
qu.1.1.answer.num=332.7@
qu.1.1.answer.units=K@
qu.1.1.showUnits=true@
qu.1.1.grading=toler_abs@
qu.1.1.err=0.1@
qu.1.1.negStyle=minus@
qu.1.1.numStyle=thousands scientific dollars arithmetic@
qu.1.1.mode=Numeric@
qu.1.1.name=Cooling Temperature@
qu.1.1.comment=@
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qu.1.2.question=<div>
	A 0.5 meter gold rod, insulated all around with both ends exposed, is in a constant 20°C room. It is heated on one side to a temperature of 400 degrees Celcius. What is the heat transfer rate Q of this 2 cm diameter rod? The thermal conductivity of gold is k = 318 W/m⋅K</div>@
qu.1.2.answer.num=75.93@
qu.1.2.answer.units=J/s@
qu.1.2.showUnits=true@
qu.1.2.grading=toler_abs@
qu.1.2.err=0.1@
qu.1.2.negStyle=minus@
qu.1.2.numStyle=thousands scientific dollars arithmetic@
qu.1.2.mode=Numeric@
qu.1.2.name=Heat Transfer Rate@
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qu.1.3.question=<p>
	What is the peak wavelength of a body heated to 800 K?</p>@
qu.1.3.answer.num=4.26E-06@
qu.1.3.answer.units=m@
qu.1.3.showUnits=true@
qu.1.3.grading=exact_value@
qu.1.3.negStyle=minus@
qu.1.3.numStyle=thousands scientific dollars arithmetic@
qu.1.3.mode=Numeric@
qu.1.3.name=Peak Wavelength@
qu.1.3.comment=@
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qu.1.3.difficulty=-1.0@
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