Question

Энергия никуда не исчезает, а только...

Answer 1

энергия никуда не исчезает, а только... Используется

Answer 2

Энергия никуда не исчезает, а только преобразуется 

Answer 3

The Conservation of Energy

Energy is a fundamental concept in physics that describes the ability to do work or cause change. One of the fundamental principles of energy is the conservation of energy, which states that energy cannot be created or destroyed, but only transferred or transformed from one form to another. This principle is known as the law of conservation of energy.

The law of conservation of energy states that the total energy of an isolated system remains constant over time. In other words, the total amount of energy in a closed system remains constant, regardless of the transformations it undergoes.

Energy Transformations

Energy can exist in various forms, such as mechanical energy, thermal energy, chemical energy, electrical energy, and more. These different forms of energy can be converted from one to another through various processes. For example, when a car engine burns fuel, chemical energy is converted into mechanical energy to propel the car forward.

Energy transformations occur when energy changes from one form to another. These transformations can happen in many different ways and are governed by the laws of physics.

Examples of Energy Transformations

Here are a few examples of energy transformations:

1. When a person turns on a light switch, electrical energy is transformed into light energy and thermal energy. 2. When a wind turbine spins, mechanical energy from the wind is transformed into electrical energy. 3. When a battery powers a smartphone, chemical energy is transformed into electrical energy. 4. When a person eats food, chemical energy from the food is transformed into mechanical energy and thermal energy in the body.

The Law of Conservation of Energy in Action

The law of conservation of energy can be observed in many everyday situations. For example, consider a pendulum swinging back and forth. As the pendulum swings, it continuously converts potential energy (at the highest point of its swing) into kinetic energy (at the lowest point of its swing) and back again. The total energy of the pendulum remains constant throughout its motion, demonstrating the conservation of energy.

Conclusion

In summary, the law of conservation of energy states that energy cannot be created or destroyed, but only transformed from one form to another. Energy transformations occur when energy changes from one form to another, and these transformations are governed by the laws of physics. The conservation of energy is a fundamental principle that can be observed in various everyday situations.