8 kg/$m^3$

80 kg/$m^3$

800 kg/$m^3$

8000 kg/$m^3$

$ML{T^{ - 1}}$

$M{L^2}{T^{ - 1}}$

$ML{T^{ - 2}}$

${M^0}{L^0}{T^0}$

Angular momentum and Planck’s constant

Impulse and momentum

Moment of inertia and moment of a force

Work and torque

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

$\left[ {{{\rm{M}}^0}{{\rm{L}}^0}{{\rm{T}}^0}{{\rm{heta }}^{ - 1}}} \right]$

Dimensionless

None of these

Work and energy

Angle and strain

Relative density and refractive index

Planck constant and energy

Joule/second

Watt/ampere

Watt/coulomb

Coulomb/joule

$M{L^2}{T^{ - 2}}$

$M{L^2}\;{T^{ - 1}}$

$ML{T^{ - 1}}$

${M^0}{L^2}{T^{ - 2}}$

20 mg

200 mg

2000 mg

0.002 mg

$M{L^2}{T^{ - 2}}{K^{ - 1}}$

$ML{T^{ - 3}}{K^{ - 1}}$

$ML{T^{ - 2}}{K^{ - 1}}$

$ML{T^{ - 3}}K$

27.78 m/s

13.89 m/s

6.94 m/s

50 m/s

$M{L^3}{T^{ - 1}}{Q^{ - 2}}$

$M{L^3}{T^{ - 2}}{Q^{ - 1}}$

$M{L^2}{T^{ - 1}}{Q^{ - 1}}$

$ML{T^{ - 1}}{Q^{ - 1}}$