$1.5 imes 10^{12}$ molecules $cm^{-3}$ $\mu s^{-1}$

$2.5 imes 10^{18}$ molecules $cm^{-3}$ $\mu s^{-1}$

$1.5 imes 10^{15}$ molecules $cm^{-3}$ $\mu s^{-1}$

$4.2 imes 10^{20}$ molecules $cm^{-3}$ $\mu s^{-1}$

Force

Momentum

Energy

Acceleration

Power

Force

Momentum

Work

$\left[ {{{\rm{M}}^0}{\rm{L}}{{\rm{T}}^0}} \right]$

$\left[ {{\rm{MLT}}} \right]$

$\left[ {{\rm{M}}{{\rm{L}}^2}{{\rm{T}}^{ - 1}}} \right]$

$\left[ {{{\rm{M}}^{ - 1}}{{\rm{L}}^{ - 1}}{{\rm{T}}^{ - 1}}} \right]$

[L]

[T]

[M]

[M L T]

$\left[ {{\rm{ML}}{{\rm{T}}^{ - 2}}} \right]$

$\left[ {{{\rm{M}}^0}{{\rm{L}}^0}{\rm{T}}} \right]$

$\left[ {{{\rm{M}}^0}{{\rm{L}}^2}{{\rm{T}}^0}} \right]$

Dimensionless

Momentum

Force

Rate of change of momentum

Torque

A natural unit system where certain fundamental constants are set to 1

SI units

CGS units

MKS units

Planck’s constant and angular momentum

Impulse and linear momentum

Angular momentum and frequency

Pressure and Young’s modulus

Angular momentum

Linear momentum

Work

Coefficient of viscosity

$\left[ {ML{T^{ - 1}}} \right]$

$\left[ {M{L^2}{T^{ - 1}}} \right]$

$\left[ {{M^0}L{T^0}} \right]$

$\left[ {{M^{ - 1}}{L^{ - 1}}{T^{ - 1}}} \right]$