Details Title: AQA Physics 1a Description: GCSE revision cards for unit PHY1a Total Flash Cards: 28 Created: 01/31/2008 12:16:48		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Physics Flashcards
Cards in this set: Term infra red radiation Definition transfer of energy by electromagnetic waves Term best absorbers and emitters of thermal radiation Definition dark matt surfaces Term poor absorbers and emitters of infra red Definition light shiny surfaces Term transfer of energy by colliding particles Definition conduction Term transfer of energy by hot gases and liquids rising Definition convection Term conservation of energy Definition energy is not created or destroyed Term efficiency Definition useful energy transferred divided by total energy supplied - tells us what fraction of the energy is transferred as what was required Term wasted energy Definition energy which is not transferred in a useful way Term a unit of electrical energy Definition kilowatt hour Term the units of power Definition watts Term a watt is ... Definition a joule of energy transferred each second Term 1000 watts Definition a kilowatt Term 1500 watts in kilowatts is ... Definition 1.5 kilowatts Term 750 watts in kilowatts is.. Definition 0.75 kilowatts Term energy is normally measured in Definition joules Term electricity is transferred along the Definition national grid Term used to step up the voltage at the power station Definition step up transformer Term the voltage is stepped up on the national grid because Definition it reduces the current and so the energy lost as heat Term the units used by a 3kW kettle in 2 hours Definition 3kW x 2hrs = 6 units (kWhours) Term driven round by steam, water or air Definition turbine Term when rotated it produces electricity Definition generator Term two nuclear fuels Definition uranium and plutonium Term fossil fuels Definition coal, oil and gas Term energy sources that will not run out Definition renewable Term hydroelectric Definition a power station using water falling down hill from a damn in the mountains Term pollution from wind turbines Definition visual and some sound Term geothermal power Definition energy from hot rocks Term the way nuclear fuels produce energy Definition fission