Tuesday, 16 April 2013
4.8 explain how insulation is used to reduce energy transfers from buildings and the human body.
An insulator is something that is bad at conducting. If something with heat energy is surrounded by an insulator, it wont lose heat by conduction. This is true in buildings where insulating materials are put in walls and on floors to stop heat being lost from inside. This is the same in humans where we wear clothes to stop heat being lost from conduction. Air is a poor conductor, so materials with many air gaps in are also poor conductors; air trapped between double glazing prevents heat loss through windows.
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hey.. I find your notes very useful...if possible can you please continue from 4.9 onwards all the way till the end ?!
ReplyDeleteYes! of course, glad they're helpful!
ReplyDeletereally helpful, thanks
ReplyDeletethtx great that final i found helpful notes
ReplyDeleteThank you so much. This helped me loads :)
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ReplyDeleteThey're very helpful to me. 😊😊
ReplyDeleteReally helpful thanks
ReplyDeletealso mention radiation and how aluminium foil reflects heat back onto your body
ReplyDeleteIt doesn't reflect, it radiates because it is shiny and shiny surfaces radiate the most (+ they also absorb the most) (-;
Deleteshiny surfaces don't absorb the most matte black things do
DeleteI have been taking notes since I saw your blog now it's time to thank you Hannah thank you so much May God bless you
ReplyDeleteI have been taking notes since I saw your blog now it's time to thank you Hannah thank you so much May God bless you
ReplyDeletenice
ReplyDeleteCool stuff you have got and you keep update all of us. attic insulation removal and replacement
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