P1B GLOSSARY

ALL THE WORDS YOU NEED TO KNOW FOR P1B SINGLE SCIENCE, OCR BOARD - HIGHER TIER, PHYSICS

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P1b
Conduction ­ how heat energy is transferred through solids
Convection ­ how heat energy is transferred by the bulk motion
of liquids and gases
Efficiency ­ ratio of the useful energy output to the total
energy input in an energy transfer process
Payback time ­ time taken before money saved in heating equals
the installation cost
Radiation ­ how heat energy is transferred by infra ­ red waves
Total energy input ­ the energy transferred into a device for it
to accomplish its task
Useful energy output ­ the energy transferred by a device to do
some task

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