Physics Revision Material UValues and Heat Transfer

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>> YOUR LINK HERE: ___ http://youtube.com/watch?v=ldYzUmg757c

http://gcsephysicsninja.com The U-Value of a material tells us how good an insulator it is. So it's a good idea to have low U-value windows in your house to reduce heat loss and keep your house warm :) Check out more GCSE physics tutorials at http://gcsephysicsninja.com

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