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40 bytes added ,  10:37, 25 June 2015
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* '''Multimedia resources'''
 
* '''Multimedia resources'''
 
* '''Website interactives/ links/ simulations'''
 
* '''Website interactives/ links/ simulations'''
* '''Process (How to do the activity)'''
+
* '''Process (How to do the activity)'''<br>
 +
{{#widget:YouTube|id=B5_t45V8z1A}}
 
take 20cm of thin copper wire, winding it on a pen refill, and carefully take out to make it like a spring<br>
 
take 20cm of thin copper wire, winding it on a pen refill, and carefully take out to make it like a spring<br>
 
connect the copper spring to 3 volt electric source, record the temperatures of  after  5 minutes and 10 minutes<br>
 
connect the copper spring to 3 volt electric source, record the temperatures of  after  5 minutes and 10 minutes<br>

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