Mass is a measure of the amount of matter in an object, not a form of energy.

According to the law of conservation of energy, the total amount of energy in an isolated system remains constant, but it can be transferred from one form to another.

In a closed system, energy cannot enter or leave, so the total energy remains constant.

Mechanical energy is the energy associated with the motion of objects.

Kinetic energy is given by the formula $E_k = rac{1}{2}mv^2$, where $m$ is the mass of the object and $v$ is its velocity.

Potential energy due to height is given by the formula $E_p = mgh$, where $m$ is the mass of the object, $g$ is the acceleration due to gravity, and $h$ is the height of the object.

In a pendulum, the energy is constantly changing between kinetic energy (when the pendulum is in motion) and potential energy (when the pendulum is at its highest or lowest point).

James Clerk Maxwell first proposed the law of conservation of energy in the 19th century.

Burning wood, charging a battery, and photosynthesis are all examples of energy transformation.

The efficiency of an engine is defined as the ratio of work output to work input.

Hydropower and solar energy are renewable energy sources.

The greenhouse effect is caused by the trapping of heat by greenhouse gases in the Earth's atmosphere.

Using energy-efficient appliances, turning off lights when not in use, and unplugging electronic devices when not in use are all examples of energy conservation in everyday life.

The first law of thermodynamics is related to the conservation of energy.

The second law of thermodynamics is related to entropy.