What is the basic unit of all energy?

The correct answer is Joule because it is defined as the basic unit of energy in the International System of Units (SI). A Joule is equivalent to the amount of energy transferred when a force of one newton is applied over a distance of one meter. This makes it a fundamental measurement for quantifying energy in various forms, including mechanical, electrical, and thermal energy.

The Joule is widely used in science and engineering to represent energy, and it serves as a cornerstone for understanding energy conversions and interactions. Other units, such as calories, watts, and newtons, are related but serve different purposes. For instance, a calorie is often used specifically for measuring heat energy, a watt represents power (which is energy per time), and newtons measure force. Understanding the Joule as the basic unit of energy is essential for comprehending energy-related principles in physics and engineering contexts.