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Card 26
Front
how do lubricants reduce friction?
Back
Card 27
Front
how do thick walls reduce energy transfers in a house?
Back
Card 28
Front
how do cavity walls reduce energy transfers in a house?
Back
Card 29
Front
how does loft insulation reduce energy transfers in a house?
Back
Card 30
Front
how do double-glazed windows reduce energy transfers in a house?
Back
Card 31
Front
how do draught excluders reduce energy transfers in a house?
Back
Card 32
Front
what makes a device efficient?
Back
Card 33
Front
how do you improve efficiency?
Back
Card 34
Front
what is the only device that is 100% efficient?
Back
Card 35
Front
what is a fossil fuel?
Back
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