Gull in the Ocean. L is the length of the cable in metres. Taking the time derivative one gets p d r d t.
S m s m t L V 15936 1255 10 20 3 2 2.
The Velocity Factor is calculated using Equation 55. The velocity in the case shown in Fig. The velocity of propagation v depends on the permittivity and the permeability of the material. L is the length of the cable in metres.