The amount of energy used for a job done in engineering, physics or similar fields is extremely important. Once this significant quantity has been measured, it is represented by the joule value. In other words, joule is a kind of measurement unit that shows the amount of work and energy. Since it has many different equivalents when used in the international system of units, the joule formula must be known and converted using this way.
The joule, named after the scientist who found it, is not actually a unit of measure with a single equivalent. Over time, many different answers have been given to the question of what 1 joule is equal to, and the calculations have been tried to be made easiest. It can be a little confusing for first-timers, but this confusion disappears, especially once the formula is understood. Let’s examine in all details the questions that are curious about what is joule and what is it good for.
First of all, what are joules?
Joule was discovered by the English physicist James Prescott Joule, who lived between 1818 and 1889, and was named after this scientist. Joule is a unit of measure used to measure energy, work and heat. There are many equivalents in the international unit system based on the metric system, as well as a formula and practical examples.
Let’s look at daily practices; What does Joule do, where is it used?
- The amount of energy required to lift a 100 gram apple into the air one meter
- The energy released by this lifted apple when it falls
- The amount of energy required to heat 1 gram of water at 0.24 kelvin
- The amount of heat a person releases every 17 milliseconds
- The kinetic energy of a person moving at a speed of 0.2 m/s or 0.72 km/h
- Kinetic energy released when a 56 gram tennis ball moves with a speed of 6 m/s
- √ Kinetic energy released by a 1 kilogram body at a speed of 2 ≈ 1.4 m/s
In one meter, the joule is equal to the energy produced by the application of a force of one newton and the energy consumed by one ampere current power passing over a circuit element operating with a voltage difference of about one volt between its two different ends.
We see the clearest example in daily life in the law of joule:
As we all know, electrical energy is transformed into heat energy today. It is possible to show electric heaters, electric stoves, ovens and many other daily items as examples. The electric current passing through them transforms into energy and therefore into heat. This situation is called joule’s law, and it has a formula that is represented by international unit system measures as W = I2 x R xt and W = P xt.
The joule formula for conversion in the international system of units is:
- J = kg x m2 / s2 = N xm = Pa x m3 = W xs = C x V
In this formula, J represents kg kilogram, m meters, s seconds, N Newtons force, C coulombs, W watts, Pa pascals, V volts. You can apply this formula to convert the units of measurement used in the international system of units to joules or to convert the joule value to one of these units. Write somewhere, you definitely need it.
At the core of this formula are the following facts; It defines the volt, as the energy required to carry one coulomb of electric charge through the electric potential difference is one joule. A joule also describes wattage as it is the amount of energy required to produce one watt of power in one second. So all the units of measurement in the formula actually converge around the joule.
Multiples and meanings to facilitate Joule calculations:
- One billionth joule is represented as nanojoules, nJ.
- One-millionth joule microjoule is denoted as µJ. In the Large Hadron Collider, each particle is expected to produce 1 microjoule.
- One thousandth of a joule is expressed in millijoules, mJ.
- One thousand joules are expressed in kilojoules, kJ. The food is the standard nutritional value type.
- One million joules of megajoules is denoted as MJ. The kinetic energy of a one ton vehicle moving at 160 km/h.
- One billion joules of gigajoules is denoted as GJ.
- One trillion joule terajoules is denoted as TJ. The atomic bomb that exploded on Hiroshima released 63 TJ of energy.
- One quadrillion joule petajoule is denoted as PJ. The largest man-made atomic bomb, the Tsar, released 210 PJ of energy.
- One quintillion joule exajoule is denoted as EJ. The 2011 Tohoku earthquake in Japan had an energy of 1.41 EJ.
- A zettajoule is denoted as ZJ.
- One septillion joule yottajoule is denoted as YJ. It takes 1 YJ of energy to heat all the water on earth by 1 degree.
What equals 1 joule during conversions?
- 1 J = 1 × 107 ergs
- 1 J = 6.24150974 × 1018 eV
- 1 J = 0.2390 cal
- 1 J = 2.3901 × 10-4 kcal
- 1 J = 9.4782 × 10-4 BTUs
- 1 J = 0.7376 ft • lb
- 1 J = 23.7 ft • pdl
- 1 J = 2.7778 × 10-7 kilowatt-hours
- 1 J = 2.7778 × 10-4 watt-hours
- 1 J = 9.8692 × 10-3 liters-atmosphere
- 1 J = 11.1265 femtograms
- 1 J = 1 × 10-44 foe
- at the same time;
- 4.184 J = 1 thermochemical calorie
- 4.1868 J = 1 International Table calorie
- 3600 J = 1 watt hour
- 3.6 × 106 J = 1 kilowatt hour
- 1 J = 1 watt-second
- 4.184 GJ = 1 tonne of TNT
We talked about the details you need to know about the subject by answering questions such as what is the unit of measurement used to show the amount of work and energy in physics and engineering, what is the joule, what is it for, what is the formula, what is 1 joule equal to. Of course, the joule is a much more complex unit of measurement, but we aimed to give general information just to form an idea.
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