Changes in Energy Flashcards

All 4 cards in this deck

What does the width of each arrow on a Sankey diagram represent?

The amount of energy transferred — the wider the arrow, the more energy.

On a Sankey diagram, how are useful and wasted energy transfers shown?

The useful energy continues straight on; the wasted energy branches off, usually downwards.

What happens to the total energy in a closed system when energy transfers take place inside it?

There is no net change — the total energy stays the same.

True or false? Doing 500 J of work on an object transfers 500 J of energy to it.

True. Energy transferred (J) is equal to work done (J).