Letter | Variable or constant | Unit | Equations with variable |
---|---|---|---|
A | amperes (current) | ||
a | acceleration | ||
BMI | body mass index | ||
c | speed of light | centi- prefix: cm | E = mc² |
d | distance | d = ѵt, d = 0.5at², d = 0.5gt² | |
Δ% | percent difference | ||
F | force | , F = ma, F = −kx | |
f | frequency f | f = 1 ÷ τ | |
h | height, Planck constant | ||
i | current, | ||
g | acceleration of gravity | grams | d = 0.5gt² |
GPE | gravitational potential energy | GPE = mgh | |
KE | kinetic energy | KE = 0.5mѵ² | |
k | Hooke's constant, y-coor. quadratic vertex | F = kx, | |
l | length | liters (liquid volume) | |
λ | wavelength | ѵ = λf | |
m | mass or slope | meters | m = ρV |
Ω | Ohms (Resistance) | V = iR | |
P | Power | P = iV | |
p | momenturm | p = mѵ | |
ρ | density | m = ρV | |
R | Resistance | V = iR | |
s | arc length | seconds | |
T | temperature | ||
t | time | ||
τ | period | τ = 1 ÷ f | |
V | volume, voltage | Volts | V = lwh, V = iR |
ѵ | velocity | , ѵ = at | |
W | work (energy) | Watts (power) | |
w | width | V = lwh |