Joule

A joule is a unit of energy used to measure work, heat, or energy transfer. For example, if you lift a small object weighing about 100 grams (like a cup of coffee) to a height of one meter, you exert roughly one joule of energy. It can also represent the energy used to power small devices, like a tiny LED or a clock. Essentially, a joule quantifies the amount of energy required for a specific task or the energy released during a process, making it a standard way to compare different energy quantities across various contexts.