Variations in Energy

What is Energy?

According to Physics, Energy is the quantitative energy transmitted to a bodily system to perform a particular work on it or provide heat to it. Energy is a conserved unit. The “Conservation Of Energy” law states that energy can be converted in a form that can never be created or destroyed. Measurement of the conversation in the International System Of Units (SI) of Energy is the “joule”. The energy is transferred to the object by the work of moving it at a distance of one metre through a force of 1 Newton.

Forms of Energy:-

Energy is the ability to do any work. People gradually learned how to change energy from one form to another, and then eventually use them. Energy is used to walk and bicycle, move cars along roads and boats through water, cook food on stoves, make ice in freezers, light homes and offices, manufacture products, and send astronauts into space. It is a part of daily life.

There are total 6 forms of energy:

1. Chemical

2. Electrical

3. Radiant

4. Mechanical

5. Thermal

6. Nuclear

These forms of energy can be combined into two general types of energy. These are:

           1. Potential or stored energy

           2. Kinetic or working energy

Energy can be transmitted from one form to another form. The stored chemical energy in coal or natural gas is used in lighting. In contrast, the kinetic energy of water flowing in rivers can be converted to electrical energy, which in turn can be converted to light and heat.

There is also a different source of energy, which is divided into two categories:

1. Renewable Energy.

2. Non-Renewable Energy

Renewable and non-renewable energy sources can be replenished and not replenished, respectively. The primary energy sources produce sound energy such as heat, or they can be used to produce secondary energy sources such as electricity.

After many experiments and research, energy is classified into two major groups. The two primary forms of energies are:-

What is Potential Energy?

Potential energy is defined as the energy which is stored in a system as an outcome of the relative positions of the components of that system.

Example: If a ball is held above the ground, the system comprising the ball and the Earth has a certain amount of potential energy, then lifting the ball higher increases the amount of potential energy the system possesses.

Other examples of potential energy systems include a stretched rubber band and a pair of magnets held together so that the like poles are touching.

Formula:- U=mgh [U= Gravitational Energy]

                                 [m= mass of the body]

                                 [g= Gravitational Energy]

                                 [h= Height]

What is Kinetic Energy?

Kinetic Energy is the energy that an object has due to its motion. It is defined as the work required for accelerating a body of a given mass from rest to a certain velocity. Once the mass reaches the velocity, its kinetic energy remains unchanged until the speed changes. Velocity and kinetic energy depend on the frame of reference. In other words, an object’s kinetic energy is not invariant.

Examples:- The wind, Flying aeroplane, Throwing a ball, Driving a car, and many more.

Formula:- KE = 1/2 mv² [KE= KInetic Energy]

                                           [m= mass of the body]

                                           [v= velocity of the body]

There are also some other types of energy. Here is a brief discussion regarding those:-

Thermal energy is produced from the vibration of atoms and molecules within substances. The faster they move, the more energy they possess and the hotter they become.

Chemical Energy is stored in the bonds of the atoms and molecules, where the energy holds the particles together.

Nuclear Energy is stored in the nucleus of atoms, from where the energy is released when the nuclei are either in fission or infusion.

Electric Energy is the movement of electrons, the tiny particles that makeup atoms, and protons and neutrons.

Radiant energy:-  The light Energy or electromagnetic Energy, radiant energy is a type of kinetic energy that travels in waves.

Motion Energy:- It is the energy stored in objects; as objects move faster, more energy is stored.

Sound Energy:- It is the movement of energy through substances, which moves in waves and is produced when a force makes an object or substance vibrate.

Elastic energy:- It is a form of potential energy that is stored in an elastic object – such as a coiled spring or a stretched elastic band.

Conclusion:

Heat always moves from a warmer object to a cooler object to stabilise the temperature later. More than one form of energy is applied to something or someone. Thus, for example, the sun heats up the Earth and shares its light. It, therefore, has both Light Energy and Heat/Thermal Energy.