In the SI units, how is energy typically measured?

• A. Using meters
• B. Using liters
• C. Using joules
• D. Using kilograms

Answer: (C)

Energy is measured in joules in the International System of Units (SI). The joule is defined as the amount of energy transferred when a force of one newton is applied over a distance of one meter. This unit is universally recognized in scientific contexts for quantifying various forms of energy, including mechanical, thermal, and chemical energy.

The other options represent different physical quantities: meters measure distance, liters measure volume, and kilograms measure mass. Each of these units serves a distinct purpose that is unrelated to the measurement of energy, highlighting the specificity of the joule as the correct unit in this context.