Energy | Definition | Types & Examples

                   ANYTHING THAT HAPPENS-from a pin -drop to an explosion - requires energy. Energy is the capacity  for " doing work " ( Making something happen). Various forms of energy exist,  including light, heat, sound, electrical, chemical, nuclear, kinetic, and potential energies. Today let's talk about energy. Hello I am Vinay, let's learn something new. Read and share this article if it was helpful to you. 

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GRAVITATIONAL FORCE: DEFINITION, EQUATION & EXAMPLES

                 The Law of Conservation of Energy states that total amount of energy in the Universe is fixed -  energy cannot be created or destroyed. It means that energy can only change from one form to another (energy transfer). For example, potential energy is energy that is "stored", and can be used in the future. An object gains potential energy when it is lifted; as the object is released, potential energy change into the energy of motion ( kinetic energy). During transference, some of the energy converts into heat. A combined heat and power station can put some of the otherwise "waste" heat to useful effect in local schools and housing. Most of the Earth's energy is provided by the Sun, in the form of electromagnetic radiation . Some of this energy transfers to plant and animal life, and ultimate to fossil fuels, where it is stored in chemical form. Our bodies obtain energy from the food we eat, while energy needed for other tasks, such as heating and transport, can be obtained by burning fossil fuels - or by harnessing natural forces like wind or moving water -to get generate electricity. Another source is nuclear power, where energy is released by reactions in the nucleus of an atom. All energy is measured by the international unit, the joule (J). As a guide, one joule is about equal to the amount of energy needed to lift an apple one meter.

ASHOKA | BIOGRAPHY | HISTORY | BUDDHISM & FACTS

Energy Systems And Some Example 

The Sun 

• Electromagnetic radiation emanates in all directions from sun.
• Nuclear reactions in Sun's core convert mass to energy.
• Electromagnetic radiation of about 100 thousand million million J reaches Earth from sun each second.
• Sun radiates about 300 million million million J of energy each second.

Oil Rig

• Energy of electromagnetic radiation is stored in oil, a fossil fuel, retrieved by oil rig.

OIL- Fired Power Station 

• Electrical energy transmitted to homes via high - tension wires.
• Heat turns water to steams, which drives a turbine to produce electrical energy.
• Power station releases chemical energy by burning oil to produce heat.

Household appliances 

• Microwave oven uses electrical energy to heat food using about 700 J each second
• A television uses about 150 J electrical energy each second , given off a heat, light and sound.
• Electrical energy is converted to kinetic energy of moving air in a hairdryer.
• In a washing machine, electrical energy changes to heat, kinetic energy, and sound .

Human 

• Chemical energy in rider's muscles used to give bicycle kinetic energy.
• Bicycle and rider gain gravitational potential energy by climbing a hill.
• Human gains chemical energy from eating plants or animals.

Tree

• Leaves trap light energy from Sun, converting it to chemical energy of sugar by photosynthesis .

Burning wood

• Chemical energy in wood is released as heat, light, and sound by burning. 

Crops

• Sun's energy converted to chemical energy in photosynthesis, which builds sugars in grasses.

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