An athletic coach told his team that muscle times speed equals power. What dimensions does he view for muscle?

Which one of the following quantities has dimensions different from the remaining three?

The damping force on an oscillator is directly proportional to the velocity. The units of the constant of proportionality are:

The fundamental physical quantities that have the same dimensions in the dimensional formulae of torque and angular momentum are

$Assertion$ : The dimensional formula for relative velocity is the same as that of the change in velocity.
$Reason$ : Relative velocity of $P$ with respect to $Q$ is the ratio of the velocity of $P$ and that of $Q$.

$A$ temperature difference can generate $e.m.f.$ in some materials. Let $S$ be the $e.m.f.$ produced per unit temperature difference between the ends of a wire,$\sigma$ the electrical conductivity and $\kappa$ the thermal conductivity of the material of the wire. Taking $\text{M, L, T, I}$ and $K$ as dimensions of mass,length,time,current and temperature,respectively,the dimensional formula of the quantity $Z=\frac{S^2 \sigma}{\kappa}$ is :-