Energy Isn't lost. It is convered to
matter
heat
water
light

Light

Matter

Heat

Explanation:

According to Law of Conservation of Energy, Energy is neither created nor destroyed.

Energy can be converted to matter, heat and light,

Examples : -

( i ) Atom bombs and nuclear reactors are practical examples of the formula working in one direction, turning matter into energy. It accounts for the huge amounts of energy released in nuclear reactions, and the huge amount you'd need to inject to turn energy into matter.

( ii ) Thermal energy can be converted to heat energy.

( iii ) In the case of an electric bulb, the electrical energy is converted to light and heat.