An obvious example is the mechanical energy of a waterfall (or hydraulic dam) being converted into electricity which in its turn may be changed into heat or light.
(An obvious example; is; the mechanical energy of a waterfall (or hydraulic dam) being converted into electricity which in its turn may be changed into heat or light) (the mechanical energy of a waterfall (or hydraulic dam) being converted into electricity; may be changed; into heat or light)
An obvious example the mechanical energy of a waterfall (or hydraulic dam) being converted into electricity
is may be changed
the mechanical energy of a waterfall (or hydraulic dam) being converted into electricity which in its turn may be changed into heat or light
into heat or light