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what are the nine types of energy?
electrical, light, sound, kinetic, nuclear, thermal, gravitational potential, elastic potential and chemical
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what are the non-renewable energy sources?
coal, oil, natural gas, nuclear fuels
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what are the renewable energy sources?
wind, waves, tides, hydro-electric, solar, geo-thermal, food and biofuels.
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what is a renewable energy?
its an energy source which will never run out.
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what is a non-renewable energy source?
its an energy source which sometime in the future will run out. also causes pollution.
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how is electricity is distributed via the national grid?
the national grid takes electrical energy from power stations to where it is needed in homes and industries.
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Types of wavelength in order smallest to biggest?
radio waves, micro waves, infa red waves, visible light, ultra violet, x-rays and gamma rays.
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what is specific heat capacity?
specific heat capacity tells you how much different types of energy can store.
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what surface absorbs infra red radiation the best?
black matt
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what reflects infra red radiation
white and shiny surfaces
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what is the longest wave length in the em spectrum?
radio waves
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What is it called when water turns into a gas?
evaporation
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what is a U value?
It shows how fast heat can transfer through a material.
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name 3 ways heat can be transferred?
Conduction, convection, radiation
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what is the formula for specific heat capacity?
E=M x C x 0.energy transferred = mass x SHC x temperature change.
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What is effected by the weather more, Overhead cables or underground cables?
overhead cables
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What is frequency measured in?
hertz
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what is conductions main form of heat transfer?
solids
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what is the equation for wave speed?
Wave Speed = Frequency x Wavelength
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