(Food for thought for the relatively new folk here...and perhaps even
some old-timers.)

Consider a system (linear, time-invariant, steady-state excitation and
all that jazz) in which a source delivers 1 watt to a load composed of
a uniform transmission line terminated in a load. Further, this line
has some loss and the frequency is low enough that its characteristic
impedance is noticably reactive, just as Reg has pointed out. Call it
Ro-jXo. What should the impedance of the load be to maximize power
dissipated in the load? Is the answer a function of anything else not
yet stated?

Cheers,
Tom