CoachThe forms of energy, formally presented: kinetic energy — motion’s share, ; potential energy — stored by position or arrangement (the lifted, the stretched, the compressed); thermal energy — the disordered molecular jiggling that temperature measures; chemical energy — stored in matter’s arrangements: food, fuels, batteries; electrical energy — the marching current’s deliverable; radiant energy — carried by light itself, sunshine’s shipping form; and nuclear energy — locked in the atom’s core, the deepest store humans have opened.
উদাহরণ
Example 70.3 (The great trade: against )
Drop a ball from height : as it falls, its account transfers, joule by joule, from potential to kinetic. At the ground, the whole has become — set them equal and the mass cancels:
this year’s square root earning its keep. From : — seventy kilometres per hour, mass be what it may. The pendulum plays the trade both ways forever (minus a whisper to the air); the skateboarder in the half-pipe likewise: height to speed to height, the two formulas passing one sum back and forth.