Art wrote:
"---Joules are not necessarily accelerating."

True.

Terman says:
"Radio waves are produced to some extent whenever a wire in open space
carries a high-frequency current."

Kraus says:
"Thus, time-changing current radiates and acceleerated charge radiates."

A joule is a unit of work or energy in the MKS system. A joule is the
quantity of energy needed to transport one coulomb of charge between two
points of one volt potential difference.

Incidentally, "average power" is the kind of power we ordinarily use.

Radio waves as Terman uses above are of the energy which escapes from
the near field of the wire and is unlikekly to be recaptured by the
wire.

Best regards, Richard Harrison, KB5WZI