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Power
P = E / t
Change in thermal energy
∆E = m c ∆θ
Elastic potential energy
Ee = 1/2 k e²
Power
P = W / t
Efficiency
Useful output energy transfer / total input energy transfer
Efficiency
Useful power output / total power input
Charge flow
Q = I t
Potential difference
V = I R
Power
P = V I
Power
P = I² R
Energy transferred
E = Q V
Density
p = m / V
Weight
W = m g
Work done
W = F s
Force
F = k e
Pressure
P = F / A
Distance
s = v t
Acceleration
a = ∆v / t
Final velocity and initial velocity
v² - u² = 2 a s
Resultant force
F = m a
Momentum
p = m v
Force
F = m ∆v / ∆t
Wave speed
v = f λ
Magnification
Image height / object height