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 …

焦耳是因紀念物理學家 詹姆斯·焦耳 而命名 [1][2]。 1焦耳可以定義為： 施加1 牛頓 作用力 經過1米 距離 所需的能量（或做的機械功）。 移動1 庫侖 電荷 通過1 伏特 電壓差 所需做的功，或1庫侖·伏特。 這關係也可以逆反過來定義伏特。 產生1 瓦特 功率 1秒時間所需做的功，或1瓦特·秒。 這關係也可以逆反過來定義瓦特。 用單位表示可表示為： 雖然在單位方面，表示焦耳為牛頓·公尺是正確的，為了避免與 力矩 單位發生混淆， 國際度量衡局 並不鼓勵這種用法 [3]。 力矩與能量的 …

焦耳是因紀念物理學家 詹姆斯·焦耳 而命名 [1][2]。 1焦耳可以定義為： 施加1 牛頓 作用力 經過1米 距離 所需的能量（或做的機械功）。 移動1 庫侖 電荷 通過1 伏特 電壓差 所需作的功，或1庫侖·伏特。 這關係也可以逆反過來定義伏特。 產生1 瓦特 功率 1秒時間所需作的功，或1瓦特·秒。 這關係也可以逆反過來定義瓦特。 用單位表示可表示為： 雖然在單位方面，表示焦耳為牛頓·公尺是正確的，為了避免與 力矩 單位發生混淆， 國際度量衡局 並不鼓勵這種用法 [3]。 力矩與能量的 …

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.

A joule is the SI base unit for energy. It is equal to [math]1 \frac{kg\cdot m^2}{s^2}[/math] . [1] In physical terms, lifting an apple one meter takes 1 joule of energy.

Energy is defined via work, so the SI unit of energy is the same as the unit of work – the joule (J), named in honour of James Prescott Joule [1] and his experiments on the mechanical equivalent of heat. In slightly more fundamental terms, 1 joule is equal to 1 …

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 ). 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 ...

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.

The joule is the unit of energy in the International System of Units (SI). It is equal to the amount of work done when a force of 1 newton (N) displaces a mass through a distance of 1 meter (m) in the direction of the force applied.

2022年4月12日 · There are 4,184 joules in a kilocalorie; you can use this with the unit factor method (Section 1.3 to convert between the two forms of energy.) A unit for energy that will be used more often in this course is the electron Volt, abbreviated eV. The conversion rate to joules is: 1eV = 1.6022 ×10−19 J 1 e V = 1.6022 × 10 − 19 J.