Physics
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Types of energy
Kinetic energy
Gravitational energy equation
electricty
work done
Specific heat capacity
insulation
current
charge
ressistance
re wiring a plug
National grid
Solids
Liquids
Gasses
Particle model of matter
Internal heat
Density
Alpha
Beta
Gamma
Half life
Radio active decay
Mass times gravitational field strength times height
V squared times 0.5 times mass
gravitational field strength on earth = 10n
Amount of heat required to change the tempreture of 1 kg of a substance
When an object falls it does not decrease in speed but it decreases in gravitational potential energy
Force times distance
Efficency
total energy in / totally useful energy made
When an unstable nucleus decays it gives out either Alpha,Beta or Gamma particles
Two protons and two neutrons
Fast moving electrons
High energy electromagnetic radiation
The half life means that in radioactive material it takes half the time for the nuclei to decay
Whenan alpha particle is realease the mass number of the element reduces by 4 atomic number reduces by 2
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When a beta particle is released the atomic mass number remains unchanged but the atomic changes to an increase in one
Particles move in all directions
Bounds are weak
Strong bounds
Particles are fixed position
energy =mass times specific heat capacity times temp change
Mass divided by volume
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Can flow
particles move around each other
Energy is shared to consumers through the national grid at a very high voltage to reduce energy loss
the fuel is burned to boil water to make steam
the steam makes a turbine spin
the spinning turbine turns a generator which produces electricity
the electricity goes to the transformers to produce the correct voltage
transformers which increase voltage are called step up transformers
Transformers which reduce voltage are called step down transformers
kinetic energy + potential energy
fuse breaks the circuit if there is a fault within an appliance and high current flows through it
chemical energy
thermal/heat energy
Sound energy
gpe
kinetic energy
elastic potential
insulates things-keeps warmth in
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pins made of brass as conduct electricity and are strong
inner core wire made of copper as soft and conducts
outer wire made of wire as doesn't conduct
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If the live wire touches the outer casing the earth wire profides a safe place for the energy to flow without causing a shock
strippy earth
blue is neutral
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