energy in the home
insulation in the home
an insulator is a material the reduces the heat energy transferring through it
you loose heat through walls roof windows door and the floor
cavity wall insulation, double glazing, carpets, door seals and fibre glass can be used to reduce heat loss
insulators trap the heat and stop heat convection currents
wiring a plug
three wires are neutral, live and the earthwire
neutral wire - kept at zero completes the circuit
live wire - carries current between the negative and positive
earth wire - safety wire stop you fro getting electric shock
paying for electricity
power = how much energy transferred per second
power= energy / time
energy = power x time
time = energy / power
kw x hours = kwh
100kw x 6 hours = 600kwh
national grid
step up and down transformers
step up increase the voltage to go along power lines and step down decreases the voltage
burn coal to release lots of energy then releases steam which spins a turbine which spins a generator which generate electricity then goes through a step up transformer and along the power lines and through a step down transformer then to homes and factory's
nuclear power
Nuclear power plants heat water to produce steam. The steam is used to spin large turbines that generate electricity. Nuclear power plants use heat produced during nuclear fission to heat water. In nuclear fission, atoms are split apart to form smaller atoms, releasing energy
dangerous and radiation