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Why does the pin at the end of the conductive metal fall before those in the middle???????

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Do you conclusions agree with this source?  Do you think this source is reliable?

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The value of 0.02 W/mK for polyurethane can be taken as a nominal figure which establishes polyurethane foam as one of the best insulators. NIST published a numerical approximation routine for calculating the thermal conductivity of polyurethane at http://cryogenics.nist.gov/NewFiles/Polyurethane.html . Their calculation for freon filled polyurethane of density 1.99 lb/ft 3 at 20°C gives a thermal conductivity of 0.022 W/mK.

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Comment on one other group's work....

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Great ideas! Most people need to add  a description/ evaluation of your evidence.

The hard bit now is to explain why some metals are better conductors!
Clue - there are two 'factors' that a few of you have started to discuss...

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our hypothesis was that copper would be the fastest conductor of heat

because it has the highest atomic number which means that it has the

highest number of electrons. this allows

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Our hypothesis was that Iron would conduct slowest due to its lack

of electons and high density. In addition we believed copper would

conduct the fastest as it has the most electrons. Our evidence

supports our hypothesis as copper was twice as fast as any other metal. #science

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 Emily Tubb, Niamh Divers, and Grace Navas

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 Emily Tubb, Niamh Divers, and Grace Navas

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Our hypothesis was that iron would be the slowest conductor

due to its high density and lack of space for electrons to move.

We thought that copper would be the best (quickest) conductor

because it has the most electrons.

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We found that aluminium conducted heat the fastest and

Iron took the longest to conduct it.

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we think that iron will take the longest to conduct heat and

also that copper will be the best conducting heat.

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We think that copper will be the best conductor

because it is used on electrical wires and other household items

that are required to conduct heat, like the bottom of a pan.

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H. Copper will conduct heat the quickest.

C. Copper conducted heat the fastest by far.

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Copper because it is the best conductor

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Mark Metcalfe, Nick Kimish, Cameron Russell

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Mark Metcalfe, Nick Kimish, Cameron Russell

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We think copper has the highest rate of conduction because people make pans out of copper so it must get hot very quickly

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The silver one will conduct the quickest because according to Dan it looks more metally.

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Mr N Which metal has the highest rate of conduction? 

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Mr N Which metal has the highest rate of conduction? 

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Include a hypothesis, conclusion and evidence.

Did your evidence support, refute, or neither?