Doomlearn
DE

What a kilowatt-hour really is, in muscle power.

One kilowatt-hour is 3.6 million joules. That lifts a one-tonne car about 370 metres, heats roughly 10 litres of water from 20 to 100 °C, or runs a 10-watt LED spotlight for 100 hours. A person can sustain about 100 watts on a bicycle, so generating one would take 10 hours of pedalling.

Useful: At 30 cents per kilowatt-hour, ten hours of your body's hard labour sells for 30 cents.

Source: en.wikipedia.org

AlltagEinheitenEnergie

Difficulty:

Keep reading

This card belongs to the topic Science & Tech. Every card is short, cites a source and can be saved – due ones come back by themselves later.