A suitable unit for gravitational constant is
$kg{\rm{ - }}\,m\;{\sec ^{ - 1}}$
$N\;{m^{ - 1}}\sec $
$N\,\,{m^2}\,k{g^{ - 2}}$
$kg\,m\,{\sec ^{ - 1}}$
The unit of angular acceleration in the SI system is
The dimension of Planck constant equals to that of
Length cannot be measured by
$Parsec $ is a unit of
What is unit system ? Write different types of system of units.