space. The capacitance of free space is the same as the permittivity of free space. The inductance of free space is the same as the permeability of free space. Medium C (pF/m) L (nH/m) v (m/μs) Z (Ω) R for f ≤ 1kHz (mΩ/m) RG58/U Coaxial Cable 93.5 273 198 54