Physics Equations - Electricity, Waves and Energy Resources

P = I x V

Power = current x voltage

E = I x V x t

energy = current x voltage x time

V = I x R

voltage = current x resistance

Q = I x t

charge = current x time

E = Q x V

Energy transferred = charge x voltage

v = f x λ (lambda)

wavespeed = frequency x wavelength

f = 1/t

Frequency = 1/time period

n = sin i / sin r

refractive index = sin (angle of incidence) / sin (angle of refraction)

sin(c) = 1/n

sin(critical angle) = 1/refractive index

efficiency = total useful output/total output/input x 100

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W = F x d

work done = force x distance

GPE = m x g x h

Gravitational potential energy = mass x gravitational field strength x height

KE = 1/2mv^2

Kinetic energy = 1/2 x mass x velocity^2

w = m x g

Weight = mass x gravitational field strength

P = W/t

Power = work done / time

s = d/t

speed = distance/time