The unit of the coefficient of viscosity in $S.I.$ system is
$m/kg{\rm{ - }}s$
$m{\rm{ - }}s/k{g^2}$
$kg/m{\rm{ - }}{s^2}$
$kg/m{\rm{ - }}s$
The velocity of a particle depends upon the time $t$ according to the equation $v = \sqrt {ab} + bt + \frac{c}{{d + t}}$ The physical quantities which are represented by $a, b, c$ and $d$, are in the following order
The unit of Stefan-Boltzmann s constant $(\sigma )$ is
Oersted is a unit of