| Thing | Type | kCal | Watt-hours | BTUs |
|---|---|---|---|---|
| Mainspring 2824-2 in ETA watch | mechanical storage | 0.00007 | 0.00008 | 0.0002 |
| 100g of carbon-14 over a day | radioactive storage | 0.359 | 0.4167 | 1.42 |
| 100kg of rocks 5 meters above the ground | mechanical storage | 1.195 | 1.39 | 4.74 |
| iPhone 7 Plus battery | electrochemical storage | 9.533 | 11.08 | 37.8 |
| 1L of water from 20C to boiling | heat work | 80 | 93 | 317 |
| 70 kg person taking the stairs at Covent Garden | mechanical work | 80.64 | 93.7 | 320 |
| 2 oz. Snickers Bar | fuel | 266 | 309.151 | 1055 |
| typical daily energy use of a 74kg human | work | 2500 | 2906 | 9914 |
| 1 ft, 23 lb flywheel at 100k rpm | mechanical storage | 2581 | 3k | 10.2k |
| 3rd gen Prius battery | electrochemical storage | 3785 | 4.4k | 15k |
| 1kg seasoned (~15%) firewood | fuel | 3785 | 4.4k | 15k |
| 1kg anthracite coal | fuel | 8312 | 9.661k | 33k |
| 1 Gallon of gasoline | fuel | 28,394 | 33k | 113k |
| 1kg of Hydrogen | fuel | 31,070 | 36.11k | 123k |
| Max Tesla car battery | electrochemical storage | 86,042 | 100k | 341k |
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January 11, 2017 20:36
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