Without them we'd be freezing in the dark at the mall.
James Joule found total energy remains the same,
(no matter what it's form) that's why it carries his name.

Chemical, electrical, potential and heat,
Radiant, kinetic, ooh the list is incomplete,
There always changing back and forth it's really quite a blur,
(Oh how could he) I've forgotten nuclear!

Ride a barrel down the falls,
Then cook spaggheti with meatballs,
Really make your friends amazed,
Nuke it with some gamma rays,

Fly to Venus in a rocket,
Put your finger in a socket,
You may suffer from exhaust
But none of that energy is ever really lost!

Then why can't we make a clean machine that moves perpetually?
'Cause there's another law with which all energy must agree:
Whenever it changes form it loses quality,
(In other words) Damn that rising entropy!

It's entropy you see that turns venescent to mess,
Appolus to a pig sty, why it's simply scandalous,
Energy once neat degenerates into waste heat,
(We must repeat) Because of entropy