P1C REVISION NOTES

SINGLE SCIENCE, OCR BOARD - HIGHER TIER, PHYSICS - P1C

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Loss of heat
This is why sport clothes are usually white and houses are white
in hot countries
Our houses lose heat energy by all three methods
This is both uneconomical and ungreen

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Heat loss can be avoided by
:
Loft insulin
Carpets and curtains
Double glazing
Cavity wall insulation
Draught proofing
Lagging of hot water tanks and pipes
Energy efficiency
The efficiency of a machine can be calculated using the
following…read more

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For % efficiency, multiply answer by 100
Example of efficiency = useful energy input
energy input
How efficient is a hairdryer that uses 15 watts of power but
produces only 5 watts of useful energy
Efficiency = 5 = 0.…read more

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