What is measured in joules?

The joule is the unit of energy in the International System of Units (SI). It is named after the English physicist James Prescott Joule, who studied the relationship between heat and mechanical work.

One joule is defined as the amount of energy transferred when a force of one newton is applied over a distance of one meter. It is equivalent to one watt-second or one coulomb-volt.

Joules are used to measure various forms of energy, such as mechanical, thermal, electromagnetic, and chemical energy. For example, the energy content of food is often measured in kilojoules (1 kilojoule = 1000 joules).

In everyday life, joules are commonly used to measure the energy consumption of appliances and electronic devices. They are also used in scientific research and engineering to quantify and analyze different forms of energy transfer and conversion.