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Physics (Equations (weight (mass x gravitational field strength (9.8)…
Physics
Equations
weight
mass x gravitational field strength (9.8)
newtons = mass x N/kg
force on a spring
spring constant x extension
Newtons = N/M x M
Gravitational potential energy
mass x gravitational field strength x height
Joules = Kg x N/Kg x M
efficiency of energy
useful / total
cannot be over 100% or 1
charge flow
current x time
coulombs = amps x seconds
Power
potential difference x current
watts = lots x amps
energy transferred
power x time
joules = watt x seconds
Density
mass / volume
Ohms law
potential difference = current x resistance
volts = amps x Ohms
Power
Current(squared) x resistance
w = a x Ohms
energy transferred
Charge Flow x Potential Difference
Energy Stores
Gravitational
something that can fall
Elastic
something that can stretch
Electrical
has electrical charge
Kinetic
moving
Sound
noise
Light
Nuclear
splitting or joining of atoms (fission & fussion)
Chemical
Stored
Thermal
Heat
changes to stores
energy transfers
conservation of energy
energy cannot be created or destroyed. It can only be transferred into different forms
Sankey diagram
Specific Heat Capacity
the amount of energy required to heat on Kg of a substance by 1˚C
Energy = mass x specific heat capacity x change in temp.