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Energy :zap: is defined as the ability to produce change or do work and…
Energy
:zap: is defined as the ability to produce change or do work and that work can be divided into several main tasks we easily recognize
Kinetic Energy :zap:
Is motion-the motion of waves, electrons,atoms,molecules,substances,and objects:Electrical energy,Radiant energy,Thermal energy,Motion energy,Sound energy :zap:
Sources Of Energy :zap:
People have always used energy to do work for them. Thousands of
years ago, early humans burned wood to provide light, heat their living
spaces, and cook their food. Later, people used the wind to move their
boats from place to place. A hundred years ago, people began using
falling water to make electricity.
Today, people use more energy than ever from a variety of sources for
a multitude of tasks and our lives are undoubtedly better for it. Our
homes are comfortable and full of useful and entertaining electrical
devices. We communicate instantaneously in many ways. We live
longer, healthier lives. We travel the world, or at least see it on television
and the internet.
The ten major energy sources we use today are classified into two broad
groups—nonrenewable and renewable.
Nonrenewable energy sources include coal, petroleum, natural gas,
propane, and uranium. They are used to generate electricity, to heat
our homes, to move our cars, and to manufacture products from candy
bars to cell phones.
These energy sources are called nonrenewable because they cannot be
replenished in a short period of time. Petroleum, a fossil fuel, for example,
was formed hundreds of millions of years ago, before dinosaurs existed.
It was formed from the remains of ancient sea life, so it cannot be made
quickly. We could run out of economically recoverable nonrenewable
resources some day.
Potential Energy :zap:
Is stored energy and the energy of position or gravitational potential energy there several forms of energy including: chemical energy,Elastic energy,nuclear energy,gravitational potential energy :zap:
The Law Of Conservation
Your parents may tell you to conserve energy. “Turn off the lights,” they
say. But to scientists, conservation of energy means something quite
different. The Law of Conservation of Energy says energy is neither
created nor destroyed.
When we use energy, we do not use it completely—we just change its
form. That’s really what we mean when we say we are using energy. We
change one form of energy into another. A car engine burns gasoline,
converting the chemical energy in the gasoline into motion energy
that makes the car move. Old-fashioned windmills changed the kinetic
energy of the wind into motion energy to grind grain. Solar cells change
radiant energy into electrical energy.
Energy can change form, but the total quantity of energy in the
universe remains the same. The only exception to this law is when a
small amount of matter is converted into energy during nuclear fusion
and fission.
Energy Users :zap:
The U.S. Department of Energy uses categories to classify energy
users—residential, commercial, industrial, electric power, and
transportation. These categories are called the sectors of the
economy.
Energy Users :zap: :Residential/Commercial,Industrial,Electric Power,Transportation