Joule
Joule(Joule and sign:J)SI energy、Work、Heat quantity、Electric energy unit. As for the nameJames press cot jouleIt is associated.
Like below it can define 1 joule.
- 1 joule = 1 N ｷ 1 m = 1 Newton meter = 1 kg · m2 · s-2
- 1 joule = 1 C ｷ 1 V = 1 Coulomb volt/bolt
- 1 joule = 1 W ｷ 1 s = 1 watt second
SI and JapanUnit of measureSo, making use of the definition which put out in first, "1 Newton in direction of power object 1 meter moving, work "it is defined. 1 joule approximately on the earth 102 gram (weight about of the small apple) raising 1 meter object, it is suitable to work. As for 1 joule 1 Newton's power in the direction object 1 meter moving, because it is work, as for joule "Newton meter"(N ｷ m) with it can also express. But, the same unitMoment of force(This is not energy) to be used, when "Newton meter" is used as a unit of work and energy there is an apprehension which causes confusion.
As for 1 joule, 1 volt/boltPotential dirrerenceAmong them 1 Coulomb electric charge. It is the definition where this put out in second.
As for 1 joule, 1 wattPowerWhen 1 seconds going, it can define also work. This is 3rd definition. electric power, 3600000 (= 60×60×1000) of watt second timeKilowatt-hourIs used well. With the Japanese Measurement Law with joule watt second, use of the watt-hour is recognized.
1 joule is equal to below.
- 1 N ｷ m (Newton meter)
- 1 C ｷ V (Coulomb volt/bolt)
- 1 W ｷ s (watt second)
- Approximately 2.78 × 10-7 KW ｷ h (Kilowatt-hour)
- Approximately 0.2389 cal (Calorie)
- Approximately 0.000948 BTU (The British Thermal Unit)
- 107 Erg (Erg)
- 0.1020 weight kilogram meter
- Approximately 0.738 ft ｷ lbf (Feet・Pound-force)
- Approximately 23.7 ft ｷ pdl (feetPoundal)
- 0.624×1019EV ( electron volt)
- 1.113×10-16Kg ( kilogram） - relativistic energy
Kilojoule
1Kilojoule(Sign:KJ) It is the unit of the energy which is equal to 1000 joules.
- The work of 1kJ is the work which the device of 1 kilowatt makes 1 seconds.
- At the heat quantity of 1kJ, 0℃, 3g.
- When the object of 100kg 1m (or 100m) raising the object of 1kg on the earth, work is approximately 1kJ.
- 1kJ the watt-hour 5/18 (approximately 0.The watt-hour 2778) it is equal.
Mega joule
1Mega joule(Sign:MJ) 106It is the unit of the energy which is equal to joule.
- The work of 1MJ is the work which the device of 1kW makes 15 minutes.
- At the heat quantity of 1MJ, 0 ℃, 3kg.
- 1MJ 5/18 kilowatt-hours (approximately 0.2778 kilowatt-hours) it is equal.
- 1MJ the orange juice approximately 0.It is equal to the nutrition value of 5 liters.
Related item
| Joule | Kilowatt-hour | electron volt | Weight kilogram meter | Calorie | |
|---|---|---|---|---|---|
| 1 J | = 1 kg ｷ m ｲ /s ｲ | - =0.278×10- 6 | - =6.241×1018 | - =0.102 | - =0.239 |
| 1 kWh | = 3.6×106 | = 1 | - =22.5×1024 | - =0.367×106 | - =0.860×106 |
| 1 eV | - =0.1602×10- 18 | - =44.5×10- 27 | = 1 | - =16.3×10- 21 | - =33.8×10- 21 |
| 1 kgf ｷ m | = 9.80665 | - =2.72×10- 6 | - =0.613×1018 | = 1 | - =2.34 |
| 1 calIT | = 4.1868 | - =1.163×10- 6 | - =0.261×1018 | - =0.427 | = 1 |
