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One Joule is 1 Newton Metre, ie the work done or energy transfered to an object when a one Newton force acts on it over one metre. It can also be defined as the heat energy dissipated by a current of one ampere passing through a one Ohm resistor for one second
The National Bureau of Standards (NBS, now known as The National Institute of Standards and Technology) defined the cal15 as being the ammount of energy needed to warm 1g of water from 14.5°C to 15.5°C
| Joules | Calories (15 °C, NBS 1939) |
|---|---|
| 0J | 0.00cal(NBS) |
| 1J | 0.24cal(NBS) |
| 2J | 0.48cal(NBS) |
| 3J | 0.72cal(NBS) |
| 4J | 0.96cal(NBS) |
| 5J | 1.19cal(NBS) |
| 6J | 1.43cal(NBS) |
| 7J | 1.67cal(NBS) |
| 8J | 1.91cal(NBS) |
| 9J | 2.15cal(NBS) |
| 10J | 2.39cal(NBS) |
| 11J | 2.63cal(NBS) |
| 12J | 2.87cal(NBS) |
| 13J | 3.11cal(NBS) |
| 14J | 3.34cal(NBS) |
| 15J | 3.58cal(NBS) |
| 16J | 3.82cal(NBS) |
| 17J | 4.06cal(NBS) |
| 18J | 4.30cal(NBS) |
| 19J | 4.54cal(NBS) |
| Joules | Calories (15 °C, NBS 1939) |
|---|---|
| 20J | 4.78cal(NBS) |
| 21J | 5.02cal(NBS) |
| 22J | 5.26cal(NBS) |
| 23J | 5.49cal(NBS) |
| 24J | 5.73cal(NBS) |
| 25J | 5.97cal(NBS) |
| 26J | 6.21cal(NBS) |
| 27J | 6.45cal(NBS) |
| 28J | 6.69cal(NBS) |
| 29J | 6.93cal(NBS) |
| 30J | 7.17cal(NBS) |
| 31J | 7.41cal(NBS) |
| 32J | 7.64cal(NBS) |
| 33J | 7.88cal(NBS) |
| 34J | 8.12cal(NBS) |
| 35J | 8.36cal(NBS) |
| 36J | 8.60cal(NBS) |
| 37J | 8.84cal(NBS) |
| 38J | 9.08cal(NBS) |
| 39J | 9.32cal(NBS) |
| Joules | Calories (15 °C, NBS 1939) |
|---|---|
| 40J | 9.56cal(NBS) |
| 41J | 9.80cal(NBS) |
| 42J | 10.03cal(NBS) |
| 43J | 10.27cal(NBS) |
| 44J | 10.51cal(NBS) |
| 45J | 10.75cal(NBS) |
| 46J | 10.99cal(NBS) |
| 47J | 11.23cal(NBS) |
| 48J | 11.47cal(NBS) |
| 49J | 11.71cal(NBS) |
| 50J | 11.95cal(NBS) |
| 51J | 12.18cal(NBS) |
| 52J | 12.42cal(NBS) |
| 53J | 12.66cal(NBS) |
| 54J | 12.90cal(NBS) |
| 55J | 13.14cal(NBS) |
| 56J | 13.38cal(NBS) |
| 57J | 13.62cal(NBS) |
| 58J | 13.86cal(NBS) |
| 59J | 14.10cal(NBS) |