0654 IGCSE Formula List
Biology
Actual size = Image size
magnification
Chemistry
 Number of neutrons = Nucleon number – Atomic number
 Number of moles =
Mass
Ar or Mr
 Volume of a gas = number of moles x 24
(at room temperature and pressure)
 Concentration = number of moles
Volume
Physics
 Speed =
distance
time
 Velocity =
displacement
time
 Acceleration = change in velocity
Time
 Weight = mass (kg) x 10
(on Earth)
= v-u
t
 Density =
mass
volume
 Hooke’s law: Force = constant x extension = kx
 Pressure = force
area
 Work = Force x distance
 Power =
work
time
 Kinetic Energy = ½ x mass x velocity2
 Gravitational potential energy = mass x gravitational field strength x height
 Efficiency (%) =
useful energy output
total energy input
 Pressure and volume of a gas:
 Specific heat capacity:
Energy = mass x c x change in temperature
 Wave speed = frequency x wavelength
 Current =
charge
time
 Voltage = Current x Resistance
x100
 Energy transferred = Current x Voltage x time
 Power = Current x Voltage
 Resistors in series:
 Resistors in parallel:
 Transformers:
And…
 Radioactive decay: