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Heat absorption, reflection, and radiation

by anna sung
Tags: thermodyamics
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anna sung
#1
Nov17-10, 05:59 PM
P: 46
1. The problem statement, all variables and given/known data

1.if you were to paint a house that reflects heat during summer and radiates heat during winter nights. which color should a house be painted?
green, red, black, white, or pink?

2. why do gardeners mix soot in the soil?


3. The attempt at a solution
1.i say it is green. It reflects the heat most as the color gets lighter and abosrobs heat as the color gets darker. in order to satisfy both situations i'm thinknig the color should be between light and dark so i picked green. But i'm still not 100% sure because there is red.
can you please explain your answer?

2. they mix soot in the soil to darken the color and absorb more heat which leads faster vegetation?
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NobodySpecial
#2
Nov17-10, 06:22 PM
P: 474
If you want an object to absorb lots of heat - what color would it be?
Is a hot object radiating heat any different from an object absorbing radiated heat?

hint: What do you call the area of physics dealing with radiation and temperature of objects eg. _____body problems.


Personally I thought your mixed soot into the ground to make clay soil drain better ?
Delzac
#3
Nov17-10, 11:57 PM
P: 389
Hmmm, i don't think there's an answer for question one. Is there?

delzac


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