james investigated heat conduction in copper and plastic to find out which is a better insulator.He used Vaseline to stick a drawing pin to the of a bar made of copper and bar made of plastic.Each bar is 10cm long dameter of 1cm.James held the ends without the drawing pin over a Bunsen burner flame with a pair of tongs.He recored how long it took for each drawing pin to drop. Which variable was measured and which instrument is suitable for measuring the variables you mentioned. Which variable was changed. Tell us how James could tell from his results which substance is the better insulator.

james investigated heat conduction in copper and plastic to find out which is a better insulator.He used Vaseline to stick a drawing pin to the of a bar made of copper and bar made of plastic.Each bar is 10cm long dameter of 1cm.James held the ends without the drawing pin over a Bunsen burner flame with a pair of tongs.He recored how long it took for each drawing pin to drop. Which variable was measured and which instrument is suitable for measuring the variables you mentioned. Which variable was changed. Tell us how James could tell from his results which substance is the better insulator.