Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
4 Cards in this Set
- Front
- Back
|
State that energy is wasted heating the surroundings in energy transfers. |
Energy that is 'wasted', like the heat energy from an electric lamp, does not disappear. Instead, it is transferred into the surroundings. |
|
|
State that this wasted energy spreads out and is no longer of use. |
The 'wasted' energy is transferred into the surroundings and spreads out so much that it becomes very difficult to do anything useful with it. |
|
|
Identify useful and wasted energy in transfers. |
Light bulb: 100J electrical energy (useful) -> 10J light energy (useful) + 90J heat energy (wasted) |
|
|
Explain how friction is the cause of wasted energy. |
Friction creates heat but this heat is not used so it's wasted and is transferred to the surroundings. |
