One joule is equal to the amount of work done when a force of one newton displaces a body through a distance of one metre in the direction of that force. It is also the energy dissipated as heat when an electric current of one ampere passes …

2024年8月7日 · What is a Joule? A Joule is a unit of energy in the International System of Units (SI). It is defined as the amount of work done when a force of one newton is applied over a distance of one meter. In simpler terms, a Joule represents the energy required to perform a specific action, such as lifting a small apple one meter up in the air.

2019年3月7日 · 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).

2019年5月22日 · Joule – Energy Units. Joule (unit: J). Joule is a derived unit of energy. 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. 1 joule = 0.239 Calories; 1 joule = 9.48 x 10-4 BTU; 1 joule = 2.778 x 10-7 kWh

1 J is defined as the work done for one ampere of electric current to pass through an electric circuit with external resistance equivalent to one ohm per second. It can be illustrated by the following equations: E = C V — (1) V = I R — (2) P = V I — (3) E = P t — (4) Combining (2), (3) and (4), E = I 2 R t

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. Named in honour of the English physicist James Prescott Joule, it equals 10 7 ergs, or approximately 0.7377 foot-pounds.

joule: the SI unit of energy. One joule is the kinetic energy of an object with a mass of 2 kilograms moving with a velocity of one meter per second. 1 J = 1 kg m 2 s-2. 4.184 J = 1 cal.

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1 Joule (J) is the MKS unit of energy, equal to the force of one Newton acting through one meter. 1 Watt is the power from a current of 1 Ampere flowing through 1 Volt. 1 kilowatt is a thousand Watts. 1 kilowatt-hour is the energy of one kilowatt power flowing for one hour. (E = P t).

2023年11月17日 · Joule (J) is the standard unit of measurement for energy in the International System of Units (SI). It is defined as the energy required to move an object one meter in the direction of the force of one Newton. The joule is used in different fields, including physics, engineering, and chemistry.