Coolingdown
Listthefactorsthataffecthowfastanobjectcools.
Tryandexplainthefollowing:
1) Theseatemperaturedoesn’tchangemuchonahotday,but
thelandtemperaturechangesalot.(Hint:thinkaboutspecific
heatcapacity)
2) Prematurebabiesareplacedin
incubatorstomaintaintheir
temperature.(Hint:thinkabout
surfacetovolumeratio)
3) Highspeedcomputerchipsneedcooling
finsandfanstoblowairoverthem.(Hint:
thinkaboutsurfacearea)
4) Carradiatorsareoftenpaintedblack.
(Hint:thinkaboutheat
radiation)
5) ArcticFoxeshavesmallears,whereas
DesertFoxeshavelargeears.(Hint:lookat
yourtextbook)
6) Windchillismuchmoreextremeifyouhavejust
comeoutoftheseafromswimming.(Hint:think
ofevaporation)
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7) Ahotcupofteawillcoolveryquicklyiftheroomis
cold,butmoreslowlyiftheroomiswarm.(Hint:lookatyour
textbook)
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