What does the energy we get out of a machine consist of?
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Card 7
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How is energy often wasted by machines?
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Card 8
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When is friction useful?
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Card 9
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What happens to the wasted energy from a lightbulb?
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Card 10
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Why should we talk about energy being 'wasted' not energy being 'lost'?
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Card 11
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**SOMETIMES WASTED ENERGY IS TRANSFERRED AS SOUND, BUT THE AMOUNT IS USUALLY VERY SMALL. THIS ENERGY WILL ALSO EVENTUALLY BE TRANSFERRED TO THE SURROUNDING AREA**
