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Heat and Temperature:What influences heat flow?
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<font face="Verdana, Arial, Helvetica, sans-serif" size="5" color="#FFFFFF"><strong>Heat and Temperature:</strong>What influences heat flow?</font>
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<td><font face="Verdana, Arial, Helvetica, sans-serif" size="4">So far you have learned that the random kinetic energy of atoms moves from hot to cold. This is called "heat conduction."
What influences heat flow? The area in contact? The distance heat has to flow? The material conducting the heat? </font></td>
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<strong><font size="5" face="Verdana, Arial, Helvetica, sans-serif" color="#5d6b86">What
you can do to find out:</font></strong>
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Here you can put different substances between a hot and cold solid. Heat
flows though these substances until equilibrium is reached. You can change
its thickness, length, and phase.
<p>
Use the graph to estimate what factors speed or retard heat flow. What
do you predict will conduct heat well? Poorly? How do you predict mass
will affect heat conduction? Experiment with the different substances.
Keep careful notes about what you find.
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<strong><font size="5" face="Verdana, Arial, Helvetica, sans-serif" color="#5d6b86">Think
about it: </font></strong>
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<strong><font face="Arial, Helvetica, sans-serif" size="4">What do you
conclude about how area and distance affect heat conduction. How well does
a gas conduct? Be sure to refer to your data.</font></strong>
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<strong><font size="5" face="Verdana, Arial, Helvetica, sans-serif" color="#5d6b86">How
does mass influence heat flow?</font></strong>
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<font size="4" face="Verdana, Arial, Helvetica, sans-serif">In the next
model, you can change the mass of the material connecting the two solids. </font>
<p>
<font size="4" face="Verdana, Arial, Helvetica, sans-serif">How do you
predict mass will affect heat conduction? Run some experiments to find
out. Take snapshots of the graph for bars with heavy, light, and several
intermediate masses. What do you conclude about how mass affects heat
conduction? </font>
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<strong><font size="5" face="Verdana, Arial, Helvetica, sans-serif" color="#5d6b86">Think
about it: </font></strong>
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<strong><font face="Arial, Helvetica, sans-serif" size="4">Give two
conclusions about mass and conduction. Be sure to refer to your data.</font></strong>
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