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Current
I = Q/t
Voltage 1
V = E/Q
Voltage 2
V = IR
Power
P = IV = I²R = V²/R
Energy
E = ItV
Total Resistance (3)
R = 1/R1 + 1/R2 + 1/R3…
Total Resistance (2)
R = (R1 * R2)/(R1 + R2)
Total Resistance (any identical)
R = R1/n
Series Circuits
R1/R2 = V1/V2
Transformers
n1/n2 = V1/V2
Velocity
v = s/t
Acceleration
a = change in v / t
Work
W = mg
Force
F = ma
Work/Energy
E = Fd
Power
P = E/t
Pressure
P = F/A
Potential Energy
PE = mgh
Kinetic Energy
KE = 1/2mv²
Momentum
p = mv
Wave Speed
c = fλ
Wave Bounce
Angle of incidence = angle of reflection
Density
q = m/v
Efficiency
Efficiency = useful out / total in
Resistance of wire
R = pL/a
Final velocity
Vf = Vi + at
Final velocity²
Vf² = Vi² + 2ad
Distance
x = Vit + 1/2at²
No acceleration distance
d = 1/2 (vi + Vf)t
Magnetic flux density
F = BILcos()