What can be measured in km besides distance and speed?

Answer 1

Only distance (length) can be measured in km (SI unit of distance is m, not km). However combinations of m and something else can define other measurements. Like speed in m/s, acceleration m/s^2, force in kg*m/s^2, energy kg*m^2/s^2. In fact all of the measurements are always taken only in 5 dimensions time (Second), length (Metre), mass (Kilogram), charge (Coulomb) and temperature (Kelvin). All other units (cd, MW, kN, cc, A, mm, H, mF, etc etc) can be broken down into those 5 Base Units.,