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Formulae and units (1)

Quantity measured Formula
Acceleration Acceleration = change in velocity/time taken
De Broglie equation Wavelength of a particle (l = h/mv)
Density Density (r) = mass/volume
Double slit interference Wavelength (l) = ax/D
Electric current Acceleration = change in velocity/time taken
Electrical energy Energy = VIt
Electrical resistance Resistance (R) = voltage/current = V/I
Force Force = mass x acceleration = d(mv)/dt
Force on a current in a magnetic field Force = BILsinq
Force on a charge in a magnetic field Force = Bqv
Gravitational potential energy Gravitational potential energy = mgh
Kinetic energy Kinetic energy = mv2
Moment of a force Moment = Force x distance from pivot
Momentum Momentum = mass x velocity
Photoelectric effect hf = F + mv2
Photon energy Energy (E) = Planck's constant (h) x frequency (f)
Potential difference V = W/Q = energy/charge = Power/Current
 
 
 
© Keith Gibbs 2010