PHYSICS: ENERGY
Look at the picture of some of the things we see in our environment. Can they work or help us do work?
The answer is yes they can, because of ENERGY.
Energy enables people and other things to do work. Anything in the environment that is able to move itself or another has energy. Energy is found everywhere.
ROLE OF ENERGY IN:
- ENVIRONMENT
The wind, flowing water, waves in the ocean and falling leaves produce mechanical energy. This energy produced by moving bodies.
In a dam, mechanical energy of flowing water turns the turbines of the electric generator of hydroelectric power plant.
Plant in the environment use the radiant energy of the sun to make food during photosynthesis. Because of that, when people eat food, they obtain chemical energy from food is transformed into mechanical and heat energy. When animals move about to find food or migrate to other places during the change of seasons, chemical energy is also transformed into mechanical and heat energy.
While, wind can turn windmills. The mechanical energy of the windmills can turn a generator in turn produces electricity. The mechanical energy of the wind and waves can also move sailboat across bodies of water.
- HOME
After doing many things, we should rest and be comfortable and the best place to do that is our home.
Electrical energy is one form of energy that has many uses. It is commonly used in our homes.
This energy is transformed by a cooking range to heat energy. A lamp transforms electrical energy into light energy and heat energy.
Televisions, radio, DVD player, and speakers are used because of electrical energy.
When electric fan is plugged into an electric outlet and is turned on, it's blades rotate to cool the air round.
Because of those appliances we are entertain and all things we do become easier and faster.
- Information and Communication Technologies
Computer is a general purpose device which can be programmed to carry out a finite set of arithmetic or logical operations. Since a sequence of operations can be readily changed, the computer can solve more than one kind of problem. Computers have affected every aspect of our day-to-day life, in terms of education, office work, accounting, business, communication, shopping, and data storage amongst others
The advantages are that computers are extremely fast at communication, & in certain cases it can do even more than a phone communications wise.In supermarkets can record their stock data and they know when to order more stock While in education it looks good, fairly quick to do, spell check so as you don't make mistakes, easy to correct, lots of strong color, easy to read.
Computers transform electricity into light, sound and heat energy.
- Transportation
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Transport or transportation is the movement of people, animals and goods from one location to another. Modes of transport include air, rail, road, water, cable, pipeline, and space. The field can be divided into infrastructure, vehicles, and operations. Transport is important since it enables trade between peoples, which in turn establishes civilizations.Vehicles traveling on these networks may include automobiles, bicycles, buses, trains, trucks, people, helicopters, and aircraft.
Fuel like crude oil are important sources of energy. For example, when crude oil is produced and refined, it becomes the oil products that we use like gasoline, diesel, and refined oil. The energy from fuel can move cars.
The chemical energy in the car battery is transformed into electrical energy to start engine. The electric energy is then transformed into mechanical energy, heat energy, and light energy as the vehicle runs.
- Economy
An economy consists of the economic systems of a country or other area; the labor, capital and land resources; and the manufacturing, production, trade, distribution, and consumption of goods and services of that area.
A given economy is the result of a process that involves its technological evolution, history and social organization, as well as its geography, natural resource endowment, and ecology, as main factors. These factors give context, content, and set the conditions and parameters in which an economy functions.
In industrial economy, the water stored in the reservoir of a dam has potential energy. Water is channeled to flow and fall on the turbine blades by the tuning of the generator in the powerhouse of the dam. When this happens, the stored energy of water is changed to kinetic energy.
To work done by this energy in motion results in the production of electricity which is also a kind of kinetic energy.
Because of energy, we can found all our needs. and our economy improve and become progressive because of technology that control by energy.
TO HAVE BETTER LIFE, CONSERVE ENERGY!
