Physics P1

Georgie Townsend
Flashcards by Georgie Townsend, updated more than 1 year ago
Georgie Townsend
Created by Georgie Townsend over 7 years ago
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GSCE Physics Flashcards on Physics P1, created by Georgie Townsend on 09/18/2013.

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Question Answer
Physics Energy transfer by heating Every object emits inferred radiation.
Physics Energy transfer by heating The hotter an object is the more inferred radiation it emits in a given time.
Physics Energy transfer by heating Inferred radiation is energy transferred by electromagnetic waves.
Physics Energy transfer by heating Dark, Matt surfaces emit more inferred radiation than light, shiny surfaces.
Physics Energy transfer by heating Dark, Matt surfaces absorb more inferred radiation than light, shiny surfaces.
Physics Energy transfer by heating Light, shiny surfaces reflect more inferred radiation, than matt black radiation.
Physics Energy transfer by heating Flow, shape, volume and density are the properties used to describe each state of matter.
Physics Energy transfer by heating The particles in solids are held next to each other in fixed positions
Physics Energy transfer by heating The particles in a liquid move around at random, and are in contact with each other.
Physics Energy transfer by heating The particles in a gas more around randomly, and are much further apart than particles in a solid and liquid.
Physics Energy transfer by heating Metals are the best conductors of energy.
Physics Energy transfer by heating Materials such as fiberglass and wool are the best insulators.
Physics Energy transfer by heating Conduction of energy in a metal is due mainly to free electrons transferring energy inside the metal.
Physics Energy transfer by heating Non-metals are poor conductors because they do not contain free electrons.
Physics Energy transfer by heating Convection is the circulation of a fluid (Liquid and Gas) caused by heating it.
Physics Energy transfer by heating Convection takes place only in lipids and gases.
Physics Energy transfer by heating Heating a liquid or gas makes it less dense so it rises and causes circulation.
Physics Energy transfer by heating Evaporation is when a liquid turns into a gas.
Physics Energy transfer by heating Condensation is when a gas turns into a liquid.
Physics Energy transfer by heating Cooling by evaporation of a liquid is due to the faster moving molecules escaping from the liquid.
Physics Energy transfer by heating Evaporation can be increased by increasing the surface area of the liquid, by increasing the liquids temperature or by creating a draught of air across the liquid's surface.
Physics Energy transfer by heating Condensation on a surface can be increased by increasing the area of the surface, or reducing the temperature of the surface.
Physics Energy transfer by heating The rate of energy transferred to or from an object depends on: - The shape, size and type of material of the object. - The materials the object is in contact with. - The temperature difference between the object and its surroundings.
Physics Energy transfer by heating The greater the mass of an object, the more slowly its temperature increases when heated.
Physics Energy transfer by heating The rate of temperature change of a substance when it is heated depends on: - The energy supplied to it - Its mass - Its specific heat capacity.
Physics Energy transfer by heating Storage heaters are off-peak electricity to store energy in special bricks.
Physics Energy transfer by heating Energy transfer from our homes can be reduced by fitting: - Loft insulation. - Cavity wall insulation. Double glazing -Draught proofing -Aluminium foil behind radiators.
Physics Energy transfer by heating U-values tell us how much energy per second passes through different materials
Physics Energy transfer by heating Solar heating panels do not use fuel to heat water but they are expensive to buy and install.
Physics Using Energy Energy exists in different forms.
Physics Using Energy Energy can change from one form to another.
Physics Using Energy When an object falls and gains speed, its gravitational potential energy decreases, and its kinetic energy increases.
Physics Using Energy Energy cannot be created or destroyed.
Physics Using Energy Conservation of energy applies to all energy changes.
Physics Using Energy Useful energy is energy in the place we want it, and i the form we need it.
Physics Using Energy Wasted energy is energy that is not useful.
Physics Using Energy Useful energy and wasted energy both end up being transferred to the surroundings, which become warmer.
Physics Using Energy As energy spreads out it gets more and more difficult to use for further energy transfers.
Physics Using Energy No machine can be more than 100% efficient.
Physics Using Energy Measures to make machines more efficient include reducing friction, air resistance, and noise due to vibrations.
Physics Using Energy Electrical appliances can transfer electrical energy into useful energy at the flick of a switch.
Physics Electrical energy An electrical appliance is designed for a particular purpose and should waste as little energy as possible.
Physics Electrical energy Power is the rate of transfer of energy.
Physics Electrical energy The kilowatt-hour is the energy supplied to a 1KW appliance in 1 hour.
Physics Electrical energy Cost effectiveness means getting the best value for money
Physics Electrical energy To compare the cost effectiveness of different appliances, we need to take account of costs to buy it, running costs and other costs such as environmental costs.
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