Across
- 2. , the strength and vitality for sustained activity
- 5. , the ratio of the useful work performed by a machine or in a process to the total energy expended or heat taken in.
- 6. , the other name of the sun power
- 7. , a unit of power equal to one million watts, especially as a measure of the output of a power station.
- 8. hour , a measure of electrical energy equivalent to a power consumption of one thousand watts for one hour.
Down
- 1. , of a natural resource or source of energy not depleted when used
- 3. , the natural agent that stimulates sight and makes things visible
- 4. , plane that is made of glass