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Physics
Physics
Problem
Which of the following ratios is dimensionless? a)
v
g
ℓ
\dfrac{v}{g\,\ell}
g
ℓ
v
b)
P
ℓ
ρ
v
\dfrac{P\,\ell}{\rho\,v}
ρ
v
P
ℓ
c)
v
g
ℓ
\dfrac{v}{\sqrt{g\,\ell}}
g
ℓ
v
d)
η
ρ
v
\dfrac{\eta}{\rho\,v}
ρ
v
η
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