electrical circuits
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amps - one amp is the same as 1 coulomb per second or 6.24 x 10 to the 18 electrons passing a single point
gpe - gravitational potential energy = weight * Hight
current is meshed in amps
weight = mass x gravity
the change in gpe = mass x gravity x Height
efficiency
efficiency = useful output energy transferred by the device / total input energy supplied to the device . then x100 to get the exact percentage
to work out energy wasted you have to fined the % you then need to x the starting energy with the percentage bye. remember when doing this to change the percentage like this (%40 - 0.40)
wats is how many joules are transfer in a second
joules (work dune ) - force x distance
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a diode
a device that only allows current to flow in a certain way
one battery is actually called a cell it is only when you have more than one cells together that it becomes a battery
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energy sores
sun / solar
hydro
tidal
wind
denowige
nuclear
fossil fuel
biomass
equations
change in thermal energy = mass x specific heat capacity x temperature change
period = 1/frequency
magnification = image height / object hight
force = chang in momentum / time takenn
elastic potential energy = 0.5 x spring constant x extension
magnification = image Hight/ object height
Ee =12k e2
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