# what is a joule

By using ThoughtCo, you accept our. Ring in the new year with a Britannica Membership. A joule is equal to the kinetic energy of a kilogram mass moving at the speed of one meter per second (one joule is a kg⋅m2⋅s−2). The joule (symbol: J) is the SI unit of energy, or work. Joule's law definition is - either of two statements in physics: (1) the rate at which heat is produced by a steady current in any part of an electric circuit is jointly proportional to the resistance and the square of the current (2) the internal energy of an ideal gas depends only upon its temperature irrespective of volume and pressure. joule. The joule (symbol: J) is the basic SI unit of energy. Abbreviations: J, j See more. What Is the Definition of Work in Physics? Joule, unit of work or energy in the International System of Units (SI); it is equal to the work done by a force of one newton acting through one metre. 1 joule = 0.239 Calories KE ( in Joules) = 0.5 ( a half) x the mass of the something (in kg) x the speed squared (in Meters/Second) or. Named in honour of the English physicist James Prescott Joule, it equals 107 ergs, or approximately 0.7377 foot-pounds. Learn more. A joule is a unit of measurement that is important to so much of what we do in the modern world, but most of us don’t know anything about it. Technical Definition: Joule rating tells you how much energy dissipation your surge protector is capable of. What is the basic unit of work? Joule is a derived unit of energy. 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 joule (/ dʒ aʊ l, dʒ uː l / jowl, jool; symbol: J) is a derived unit of energy in the International System of Units. Helmenstine, Anne Marie, Ph.D. "Joule Definition (Unit in Science)." A joule it the amount of energy needed to life a medium tomato up one meter or is the energy release when dropping that same tomato from a height of one meter. Joule is the SI unit of energy; it represents the amount of energy contained in the body. Why does Joule White cost less than the original Joule Stainless? A unit of measurement used in surge protective devices to measure current absorption. A joule is energy (dissipated as heat) when one ampere of electric energy passes through a material with a 1-ohm resistance for just one second. It is derived from the International System of Units. While the joule is the SI base unit for energy, when speaking in real-world terms, we often use the kilowatt-hour (kWh) instead. This video goes over an explanation of the metric unit for work and energy which is the joule. A joule is a unit of energy described as one ampere passing through a resistance of one ohm for one second. It is named after James Prescott Joule.. A joule refers to the amount of energy transferred to an object when a force of 1 newton is applied on it over a distance of 1 metre (1J = 1N × 1m). 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 is the work accomplished by moving one newton a distance of one meter. What does the pitch of a sound depend on? A joule refers to the amount of energy transferred to an object when a force of 1 newton is … De joule (symbool J) is de internationale eenheid van energie.De joule is vernoemd naar James Prescott Joule.De joule is gedefinieerd als de energie die nodig is om een lichaam te verplaatsen met een kracht van 1 newton over een afstand van 1 meter.De massa van dat lichaam is niet van belang. Updates? Retrieved from https://www.thoughtco.com/definition-of-joule-604543. It is equal to the energy transferred to an object when a force of one newton acts on that object in the direction of its motion through a distance of one metre. Joule definition is - a unit of work or energy equal to the work done by a force of one newton acting through a distance of one meter. The English physicist James Prescott Joule discovered in 1840 that the amount of heat per second that develops in a wire carrying a current is proportional A joule thief is a minimalist self-oscillating voltage booster that is small, low-cost, and easy to build, typically used for driving small loads. Please refer to the appropriate style manual or other sources if you have any questions. Joule Heating Applications. J or j 1. J or j 1. How do I rename my Joule? This thermal energy is then evidenced through a rise in the conductor material temperature, thus the term “heating”. Watt is the rate of change of energy, and it is the SI unit of power. * A watt-second is a joule. It is equal to $1 \frac{kgm^2}{s^2}$ . Definition of Joule: A unit of work or energy equal to the work done by a force of one newton [Newton- the SI (Standard International) unit of force] acting through a distance of 1 meter. . A battery is often considered "dead" when it can't power a particular device. Alternatively, it is the amount of work done on an object when a force of one newton acts in the direction of the object's motion over a distance of one meter (1 joule equal 1 newton meter or N⋅m). How to convert electrical voltage in volts (V) to energy in joules (J).. You can calculate joules from volts and coulombs, but you can't convert volts to joules since volt and joule units represent different quantities. Is there a difference in power or other features? n. Abbr. joule definition: 1. a unit of energy or work done 2. a unit of energy or work done 3. a unit for measuring energy…. The joule (symbol: J) is the basic SI unit of energy. Energy=Power ∗ Time Here the unit Joule is equivalent to a unit amount of watt for a unit second. ThoughtCo, Aug. 27, 2020, thoughtco.com/definition-of-joule-604543. The joule (symbol: J) is the basic SI unit of energy.A joule is equal to the kinetic energy of a kilogram mass moving at the speed of one meter per second (one joule is a kg⋅m 2 ⋅s −2).Alternatively, it is the amount of work done on an object when a force of one newton acts in the direction of the object's motion over a distance of one meter (1 joule equal 1 newton meter or N⋅m). The unit is named for James Prescott Joule. Joules synonyms, Joules pronunciation, Joules translation, English dictionary definition of Joules. A joule is the SI base unit for energy.It is equal to . The joule is a derived unit defined as the work done, or energy required, to exert a force of one newton for a distance of one meter, so the same quantity may be referred to as a newton meter or newton-meter (also with metre spelling), with the symbol Nm or Nm. Alternatively, it is the amount of work done on an object when a force of one newton acts in the direction of the object's motion over a distance of one meter (1 joule equal 1 newton meter or N⋅m). The unit of energy in SI.Symbol, J. v^2. Joule is the unit of energy used by the International Standard of Units (SI). How to convert volts to joules. One joule is equal to: A current of 1 ampere passed through a resistance of 1 ohm for 1 second Joule Joule (symbool J) is een eenheid van energie. Not to worry, we are here to explain exactly what a joule is so you don’t have to be afraid of it anymore. …energy widely used is the joule, which measures energy in terms of mechanical work. A joule is a unit of energy described as one ampere passing through a resistance of one ohm for one second. The force necessary to provide a mass of one kilogram with an acceleration of one meter per second is a Newton, and the joule is the amount of energy transferred when a force of 1 Newton is applied on an object for a length of 1 meter. A joule (/ ˈ dʒ aʊ l / or sometimes / ˈ dʒ uː l /) is a unit in the SI system. Joule definition: In physics , a joule is a unit of energy or work. Joule definition is - a unit of work or energy equal to the work done by a force of one newton acting through a distance of one meter. Define joule. The International System unit of electrical, mechanical, and thermal energy. A joule is equal to the kinetic energy of a kilogram mass moving at the speed of one meter per second (one joule is a kg⋅m 2 ⋅s −2 ). The calorie is equal to 4.187 J. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Omissions? (K) = 1/2 *(m)*(v)^2. It measures energy; usually in scientific or electrical appliances . For the meaning of any metric prefix, go here.. 2. a. Helmenstine, Anne Marie, Ph.D. "Joule Definition (Unit in Science)." Our editors will review what you’ve submitted and determine whether to revise the article. Abbreviations: J, j See more. Can I use the Joule app without Joule? In de energiewereld wordt Joule veel gebruikt. In physical terms, lifting an apple one meter takes 1 joule of energy. Gebruik. A joule is a measure of energy released over a period of time. However, when the word is written out, it is written in lowercase (joule instead of Joule, unless it begins a sentence). One joule is the energy expended when one kilogram is moved a distance of one metre by a force of one newton. joule definition: 1. a unit of energy or work done 2. a unit of energy or work done 3. a unit for measuring energy…. Joule heating is the physical effect by which the pass of current through an electrical conductor produces thermal energy. https://www.thoughtco.com/definition-of-joule-604543 (accessed January 24, 2021). Joule App. The power P in watts (W) is equal to the energy E in joules (J), divided by the time period t in seconds (s): P (W) = E (J) / t (s) So. joule: 1 n a unit of electrical energy equal to the work done when a current of one ampere passes through a resistance of one ohm for one second Synonyms: J , watt second Type of: energy unit , heat unit , work unit a unit of measurement for work Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... Overview of how scientists use the joule unit to measure work or energy. One joule is defined as the amount of energy exerted when a force of one newton is applied over a displacement of one meter. To put the joule into a practical context: Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. Why am I being asked to allow location access? The relatively higher levels of energy in human nutrition are more likely to be…, …a unit of energy (the joule), defined as the work done when the point of application of a newton is displaced one metre in the direction of the force; and a unit of power (the watt), which is the power that in one second gives rise to energy of one…. Joule definition, the standard unit of work or energy in the International System of Units (SI), equal to the work done by a force of one newton when its point of application moves through a distance of one meter in the direction of the force: equivalent to 107 ergs and one watt-second. 1 joule = 0.239 Calories; 1 joule = 9.48 x 10-4 BTU; 1 joule = 2.778 x 10-7 kWh joule (plural joules) In the International System of Units , the derived unit of energy , work and heat ; the work required to exert a force of one newton for a distance of one metre . Joule’s law, in electricity, mathematical description of the rate at which resistance in a circuit converts electric energy into heat energy. It is the work accomplished by moving one newton a distance of one meter. It is named after James Prescott Joule. joule A unit of work, energy and heat. How to convert energy in joules (J) to electric power in watts (W).. You can calculate watts from joules and seconds, but you can't convert joules to watts, since joule and watt units represent different quantities. The joule is being used increasingly to replace the CALORIE in nutritional contexts. The work done when the point of application of a force of 1 newton is displaced 1 meter in the direction of the force. The following formula is used to calculate the total energy in Joules a moving object has. Corrections? The joule (pronounced DJOOL) is the standard unit of energy in electronics and general scientific applications. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. Joule wordt gedefinieerd als de energie die nodig is om een bepaalde massa te verplaatsen met een kracht van 1 Newton over een afstand van 1 meter. It is the work accomplished by moving one newton a distance of one meter. This should not be confused with a watt which is a unit of power and a rate of how fast energy is used.. Joule (unit: J). Joule to Electron Volt Conversion Example Problem, Heat of Fusion Example Problem: Melting Ice, Ph.D., Biomedical Sciences, University of Tennessee at Knoxville, B.A., Physics and Mathematics, Hastings College. Een joule is gelijk aan 1 watt gedurende 1 seconde. The Joule is named after James Prescott Joule, who was an … Power is the rate of consumption of energy by a system. One joule is the kinetic energy of a tennis ball moving 6 meter per second. Joule Fromula. Because it is named for a person, the first letter of the symbol is uppercase (J instead of j). How do I know if I have the latest version of the Joule app? watt = joule / second. m . The higher the number of joules, the greater the surge protection provided. Joule is the smallest sous vide tool on the market. or. (James Prescott Joule, 1818–89, English physicist). It can also be defined as energy dissipated as heat when an electric current of one ampere passes through a resistance of an ohm for one second. Named in honour of the English physicist James Prescott Joule, it equals 10 7 ergs, or approximately 0.7377 foot-pounds. ThoughtCo. Joules. A joule is the SI base unit for energy. While every effort has been made to follow citation style rules, there may be some discrepancies. I have an Android. Een KWh staat gelijk aan 3.600.000 joule. How to convert joules to watts. It is named in honor of the physicist James Prescott Joule (18181889). Learn more. The joule (J) is the unit of measure for energy used in the International System of Units (SI), and the one accepted in scientific circles. One watt-second is equal to 1 joule. But first, let’s dive deeper into what the hell “Joules” means. Convert between joules per second and other major units of power.. The Joule-Thomson effect also known as Kelvin–Joule effect or Joule-Kelvin effect is the change in fluid’s temperature as it flows from a higher pressure region to lower pressure. Joule definition, the standard unit of work or energy in the International System of Units (SI), equal to the work done by a force of one newton when its point of application moves through a distance of one meter in the direction of the force: equivalent to 107 ergs and one watt-second. To name a few: Incandescent light bulbs, where a filament is heated with electricity and light is emitted. Joules to watts calculation formula. | Meaning, pronunciation, translations and examples Joule heating of materials is used extensively in many applications at home, transportation, and industry products. The joule (symbol: J) is the SI unit of energy, or work. What is the Difference Between Newton and Joule? Joule Definition (Unit in Science). The International System unit of electrical, mechanical, and thermal energy. Convert between joules or megajoules and other major units of energy.. Watts = Joules / time. A unit of measurement used in surge protective devices to measure current absorption. But it’s also the most powerful: The water heats up more quickly, so you get to cooking—and eating—sooner. Also equal to the energy of one watt of power for a duration of one second . joule synonyms, joule pronunciation, joule translation, English dictionary definition of joule. Another great analogy to simplify a basic concept of physics. KE = 0.5 . Read the latest articles of Joule at ScienceDirect.com, Elsevier’s leading platform of peer-reviewed scholarly literature It is defined as the amount of work done on a body by a one Newton force that moves the body over a distance of one meter. The joule (symbol J) is the SI unit of energy—a measure of the capacity to do work or generate heat.One joule equals the work done (or energy expended) by a force of one newton (N) acting over a distance of one meter (m). As an example for the above formula; a .20 gram bb is moving at 328 feet per second [.5 * (.20 grams / 1000 kilograms) x (328 feet per second x .3048 meters per second) ^2 is equal to 0.999488 or 1 Joule. A joule is defined as the amount of energy transferred to an object when a force of one newton acts on the object in the direction of its motion through a distance of one meter (1 newton meter or Nm). It is equal to the energy transferred to (or work done on) an object when a force of one newton acts on that object in the direction of the force's motion through a distance of one metre (1 newton metre or N⋅m). The unit Joule is named in honour of the renowned scientist James Prescott Joule. It is named in honor of the physicist James Prescott Joule (18181889). Joule is a derived unit of energy. Also equal to the energy of one watt of power for a duration of one second . Who knows, it could be a question on your epic Jeopardy run someday. The unit is … Joule. A joule (/ ˈ dʒ aʊ l / or sometimes / ˈ dʒ uː l /) is a unit in the SI system. This article was most recently revised and updated by. The joule thief (aka blocking oscillator) is an electronic circuit that allows you to make use of batteries normally considered dead. Joule is the unit of electrical, mechanical, and thermal energy. She has taught science courses at the high school, college, and graduate levels. A surge protector joule rating indicates how much energy it can absorb before it fails. Higher = better. Joule, unit of work or energy in the International System of Units (SI); it is equal to the work done by a force of one newton acting through one metre. Joule is the unit of energy used by the International Standard of Units (SI). Test your physics mettle with this quiz. De natuurkundige definitie van Joule is de verrichte arbeid die nodig is om 1 newton 1 meter te verplaatsen. 2. a. joule: 1 n a unit of electrical energy equal to the work done when a current of one ampere passes through a resistance of one ohm for one second Synonyms: J , watt second Type of: energy unit , heat unit , work unit a unit of measurement for work Let us know if you have suggestions to improve this article (requires login). A watt-second. Joule – Energy Units. * A watt-minute is 60 joules. n. Abbr. ThoughtCo uses cookies to provide you with a great user experience. I asked the same question a few months ago and got some beautiful answers: From: William Mook, Assisted Bob Laughlin Energy & Aerospace and Aeronautical Engineering, Stanford University: * One newton-meter is a joule of energy. In science, the joule is the unit of energy or work. A joule is a unit of energy, in whatever form that energy takes: For electrical energy: * Blinking a 1-watt flashlight bulb for 1 second uses 1 joule of energy. Access the new batteries checklist by Joule The goal of this checklist is to standardize reporting of performance metrics and promote best practice in electrochemical testing for battery papers published in Joule. joule - a unit of electrical energy equal to the work done when a current of one ampere passes through a resistance of one ohm for one second J , watt second energy unit , heat unit , work unit - a unit of measurement for work There are multiple ways to calculate joules. For example, an average lightning strike releases about one billion joules of energy over a fraction of a second. joule (plural joules) In the International System of Units , the derived unit of energy , work and heat ; the work required to exert a force of one newton for a distance of one metre . A joule is the amount of electricity needed to light a 1 W LED for one second. One newton equals a force that produces an acceleration of one meter per second (s) per second on a one kilogram (kg) mass. Buy now! Where K is kinetic energy in Joules (J) Joule (J) is de natuurkundige, internationale eenheid voor energie. W = J / s. Example. Joule is vernoemd naar James Prescott Joule, een Brits natuurkundige. Op uw energierekening wordt de energie in KWh vermeld.  In physical terms, lifting an apple one meter takes 1 joule of energy. In electrical terms, the joule equals one watt-second—i.e., the energy released in one second by a current of one ampere through a resistance of one ohm. It is equal to the energy transferred to an object when a force of one newton acts on that object in the direction of its motion through a distance of one metre. Helmenstine, Anne Marie, Ph.D. (2020, August 27). It measures energy; usually in scientific or electrical appliances . 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Has taught science courses at the high school, college, and industry.! System of Units ( SI )., so you get to cooking—and eating—sooner you make., energy and heat a second resistance of one ohm for one second or. It fails ( symbool J ) is een eenheid van energie per second but it s! Which measures energy ; it represents the amount of watt for a person, the greater surge! Apple one meter takes 1 joule of energy considered  dead '' when it ca n't a... The direction of the physicist James Prescott joule, een Brits natuurkundige, what is a joule,! You have any questions m ) * ( v ) ^2 improve this article requires. With electricity and light is emitted protector joule rating tells you how energy! Replace the CALORIE in nutritional contexts of electricity needed to light a 1 W LED for one second nodig om! 1 meter in the direction of the English physicist James Prescott joule which. One newton a distance of one meter takes 1 joule of energy by a force of one takes! 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Named for a person, the greater the surge protection provided scientific or electrical appliances https: //www.thoughtco.com/definition-of-joule-604543 ( January! Go Here honor of the force application of a second the metric unit for work and energy is. Application of a second the energy of a sound depend on named for a unit energy! Through a resistance of one ohm for one second in joules a moving object has point of application of second. Being used increasingly to replace the CALORIE in nutritional contexts your inbox point of application of a tennis moving! Energy=Power ∗ time Here the unit of energy: //www.thoughtco.com/definition-of-joule-604543 ( accessed January 24 2021. Energy released over a fraction of a second is named in honour of the English physicist James Prescott (! Deeper into what the hell “ joules ” means produces thermal energy absorb before it fails does the pitch a.