joule
joule — noun
- joulesingular
- joulesplural
1. the standard scientific measure used to count how much energy is moved or how mu
the standard scientific measure used to count how much energy is moved or how much work is done, named after the British scientist James Prescott Joule.
Nellie's physics teacher said lifting an apple one meter costs about one joule.
countable singular: 'one joule of energy'
The label on the cereal box gives the energy value in both calories and joules.
collocation: energy value in joules (food labels)
Paloma's heater uses about three thousand joules every second to keep the room warm.
Scientists measure the energy released by a falling rock in joules, not in pounds.
A small spark from a battery may carry only a few joules of electrical energy.
- watt-second
equivalent unit (1 J = 1 W·s); used mostly in electrical contexts
- newton-meter
equivalent for work done by a force; same physical quantity as a joule
文法句型
one joule
X joules of energy
measured in joules
用法筆記
Subject of measurement is usually energy, work, or heat — never time or distance. Often paired with 'per second' to express power (watts). The plural 'joules' is used with any number other than one.