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What is the Energy?
In physics, energy is the quantitative property that is transferred to a body or physical system, as evidenced by work, heat, and light. According to the law of conservation of energy, energy can be transformed into a form but cannot be created or destroyed. Energy is a quantity that is conserved.
The joule (J) is the International System of Units (SI) energy measurement unit. The kinetic energy of a moving object, the potential energy that the object stores, the elastic energy that is stored in a solid, the chemical energy that is associated with chemical reactions, the radiant energy that is carried by electromagnetic radiation, and the internal energy that is contained within a thermodynamic system are all common types of energy.
Energy is constantly taken in and released by all living things. Because of mass-energy equivalence, any stationary object with mass (rest mass) also has an equivalent amount of energy (rest energy), and any additional energy the object acquires above its resting energy will increase the object's total mass in the same way that it will increase its total energy.
To function, human civilization needs energy, which it gets from energy resources like nuclear fuel, renewable energy, or fossil fuels. Either the solar or geothermal energy that the Earth receives drives the processes that govern its ecosystems and climates. 
Which are the main Forms of Energy?
There are many different kinds of energy, such as heat, light, sound, and so on. However, the total energy of an object, substance, or system can be broken down into potential energy, kinetic energy, or a combination of the two in a variety of ways.
Potential energy reflects an object's potential for motion and is typically a function of an object's position within a field or may be stored in the field itself. Kinetic energy is determined by an object's movement—or the composite motion of an object's components.
Even though these two classifications are sufficient to describe all forms of energy, it is frequently more convenient to refer to specific combinations of potential and kinetic energy as their own form. Mechanical energy, for instance, is the sum of a system's translational, rotational, and potential kinetic and potential energy.
According to the latest research studies, there are following 13 different types of energy.
- Chemical Energy
- Elastic Energy
- Electrical Energy
- Gravitational Energy
- Ionization Energy
- Magnetic Energy
- Mechanical Energy
- Nuclear Energy
- Radiant Energy
- Solar Energy
- Sound Energy
- Thermal Energy
- Wind Energy
What is Chemical Energy?
The energy that chemical substances produce when they undergo a chemical reaction and transform into other substances is known as chemical energy. Coal is one example of a substance that contains chemical energy. The combustion reaction in coal produces heat and light from chemical energy.
Wood is another example of a combustion reaction that produces heat and light from chemical energy. Similarly, petroleum can be burned to produce heat and light, or it can be transformed into another chemical energy, like gasoline. Dry and liquid batteries also contain chemical energy.
When an object is subjected to a brief strain, such as in a coiled spring or stretched elastic band, elastic energy is stored within it. The energy is put away in the connections between iotas. The energy that is stored when a force is applied to deform an elastic object is called elastic potential energy. 
= elastic energy 
= spring constant 
= change in position
The object springs back to its original shape and performs work while the energy is stored until the force is released. The object could be twisted, stretched, or compressed during the deformation. The utilization of elastic energy is frequently demonstrated by various rubbers and springs.
What is Electrical Energy?
| = | elastic energy |
| = | spring constant |
| = | change in position |
Electrical energy is the energy generated by forces acting on electrically charged particles and their movement. An electrical circuit delivers the combination of electric potential and electric current that provides this energy. Electrical energy can also be defined as the energy produced by the movement of electrons from one location to another.
Current or electricity is the movement of charged particles along or through a medium, like a wire. In today's world, electricity is an absolute necessity. Electricity is used by people to run appliances, computers, electronics, machinery, and public transportation systems as well as for lighting, heating, cooling, and refrigeration.
What is Gravitational Energy?
The potential energy that a massive object has in relation to another massive object as a result of gravity is called gravitational potential energy. When two objects fall toward one another, potential energy associated with the gravitational field is released. 
= gravitational energy 
= mass 
= gravitational field 
= height
The potential energy an object holds in comparison to its lower position is known as its gravitational energy. To put it another way, it is the energy that comes from gravitational force or gravity. A pen that is held above a table, for instance, has a higher potential for gravitation than a pen that is sat on the table.
What is Ionization Energy?
| = | gravitational energy |
| = | mass |
| = | gravitational field |
| = | height |
Ionization energy is the minimum amount of energy required to remove the most loosely bound electron from an isolated gaseous atom, positive ion, or molecule in physics and chemistry. Since neutral atoms have positive ionization energy, ionization is an endothermic process.
The atom's ionization energy is roughly proportional to how close the outermost electrons are to the atom's nucleus. Ionization energy is typically measured in electronvolts (eV) or joules (J) in physics.
What is Magnetic Energy?
The current that causes the electron to behave in a manner similar to that of a small magnet is produced by the movement of the charge of the electrons in the various particles. This movement is what generates the magnetic energy. Additionally, the earth has a magnetic field that generates magnetic energy.
The generator is a classic example of how magnetic energy is used. To put it another way, a magnet inside a coil is perpetually rotated in a circle by the magnetic field.
What is Mechanical Energy?
The energy of an object that is in motion or the energy that is stored in objects due to their position is known as mechanical energy, also known as kinetic energy or potential energy. Renewable energy is also driven by mechanical energy. Mechanical energy is used to produce or convert energy into many renewable energy sources.
The sum of kinetic and potential energy is mechanical energy. It is the energy involved in an object's movement and position. A compressed spring, on the other hand, has mechanical energy in the form of potential energy, while a moving vehicle has kinetic energy.
= mechanical energy 
= potential energy 
= kinetic energy
The energy of an object that is in motion or the energy that is stored in objects due to their position is known as mechanical energy, also known as kinetic energy or potential energy. Renewable energy is also driven by mechanical energy. Mechanical energy is used to produce or convert energy into many renewable energy sources.
| = | mechanical energy |
| = | potential energy |
| = | kinetic energy |
What is Nuclear Energy?
The energy contained within an atom's nucleus, or core, is called nuclear energy. To generate electricity, nuclear energy must first be released from the atom. The production of electricity through nuclear reactions is known as a nuclear power. Nuclear fission, nuclear decay, and nuclear fusion reactions can generate power from nuclear material.
Currently, the nuclear fission of uranium and plutonium in nuclear power plants generates the vast majority of nuclear power's electricity. Nuclear energy is a low-cost and environment-friendly source of energy generating.
What is Radiant Energy?
The physical energy produced by electromagnetic radiation is known as radiative energy, and it is typically observed as it spreads outward from a source into the environment. The entire electromagnetic radiation spectrum, including gamma rays, x-rays, radio frequencies, microwaves, light, and heat, are all examples of radiant energy sources.
The joule is its SI unit. By integrating radiant flux over time, one can determine the quantity of radiant energy.
What is Solar Energy?
The sun's light and heat are all that make up solar energy. There are a few different ways that people can use the power of the sun: solar cells that use sunlight to generate electricity. Solar thermal technology, in which the sun's heat is used to make steam or hot water. The sun's energy is converted into electricity by solar power.
The sun produces electricity and heat, two forms of energy that we can use. Both come from solar panels, which can be found in a variety of sizes, from rooftops on homes to "solar farms" spread out over acres of rural land.
What is Sound Energy?
When a force, such as sound or pressure, causes an object or substance to vibrate, this produces sound energy. Waves of that energy travel throughout the substance. Kinetic mechanical energy is the name given to those sound waves.
A sort of dynamic energy is produced using the vibration of the issue. Sound travels through air or water as it travels from its vibrational source. The sound can be loud, soft, high, low, or distorted depending on how it moves or what kind of vibrations caused it.
 | = | sound energy |
 | = | potential energy density |
 | = | kinetic energy density |
What is Thermal Energy?
Nuclear power alludes to the energy held inside a framework that is liable for its temperature. The flow of thermal energy is called heat. Thermodynamics, a whole branch of physics, studies how heat travels between systems and how work is done in the process.
Nuclear power sources are petroleum derivatives like flammable gas, coal, and oil, as well as sun-oriented heat, heat siphon electric intensity, and geothermal intensity.
What is Wind Energy?
The majority of wind power or wind energy is generated through the use of wind turbines. Compared to burning fossil fuels, wind power is a popular, long-lasting, and renewable source of energy that has much less of an impact on the environment. The kinetic energy of air currents is converted into electrical energy by a wind turbine.
The rotor, which converts kinetic energy into mechanical energy, and the generator, which converts mechanical energy into electrical energy, provide the majority of the energy.
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