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
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!
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