Question

1. define energy.

Explanation:

In the context of Natural Science (specifically Physics), energy is defined as the capacity of a physical system to perform work. It exists in various forms such as kinetic energy (energy of motion, given by $K = \frac{1}{2}mv^2$ where $m$ is mass and $v$ is velocity), potential energy (stored energy, e.g., gravitational potential energy $U = mgh$ with $g$ as acceleration due to gravity and $h$ as height), thermal energy, electrical energy, etc. Energy can be transferred between systems or converted from one form to another, and the total energy in an isolated system is conserved (Law of Conservation of Energy).

Answer:

Energy is the capacity of a physical system to do work. It exists in various forms (e.g., kinetic, potential, thermal, electrical) and can be transferred or converted, with total energy conserved in an isolated system.