Electromagnetic waves are transverse because the particles that are moving are perpendicular to the wave motion while compressional (also known as longitudinal) wave particles move parallel to the wave motion
The energy of a single photon is given by

where

is the Planck constant
f is the frequency of the wave (of the photon)
In our problem, the radio wave has a frequency of

, so if we put this value into the previous formula, we can find the energy of a single photon of this electromagnetic wave:
He's accelerating at 3 m/s² . That means his speed is increasing by 3 m/s every second.At the end of 8 seconds, his speed is (8 x 3 m/s) = 24 m/s .He's been moving south for the whole 8 seconds.So at the end of that time, his velocity is 24 m/s south .