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Energy

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Submitted By ababbitt11
Words 891
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Energy
Agnese
Strayer University

Dr. Andrey R. Pavlov
Science 110
April 21, 2012

We recognize energy through the concepts of force and motion. When work is done on an object, it gains energy. Energy is made of two types, potential energy which is stored energy and kinetic energy which consists of moving energy. Food is stored energy. It is stored as a chemical with potential energy. When your body uses that stored energy to do work, it then becomes kinetic energy.(Integrated Science, 2008) Any form of energy can be converted to another form. Most technological devices that we use are recognized as energy converters. Energy cannot be created, nor destroyed. This is the reason why it exists in many forms. For example, a light bulb converts electrical energy to radiant energy. It can come in various forms, mechanical, chemical, radiant, electrical, and nuclear.
Thermodynamics is the study of energy being converted from one form to another. There are three laws of thermodynamics. The first law states that energy cannot be created or destroyed, but it can be converted from one form to another. The second law states that heat energy can be transferred only from body at high temperature to the body at lower temperature. Heat can only be moved from high to low without external work being performed. If you want to move the heat energy from low temperature reservoir to high temperature reservoir, then something external must intercept in order for that to work. (Definition of Thermodynamics, 2012) For instance, an air conditioner or a refrigerator heat moved to low temperature to high temperature, needing electricity to work or perform properly. Finally, the last law of thermodynamics states that all molecular movement stops at the temperature of absolute zero or 0 Kelvin.
Fossil fuels contain stored radiant energy from organisms that lived millions of years ago. These fuels contain carbon, which are all in coal, oil, and gas. The reason they are such an important source of energy is simply because they fuel our economy from the planes, to the cars, heat, and electricity. They are all inexpensive but they are nonrenewable resources, meaning, they take millions of years to develop under extreme conditions. They can’t be recycled into the energy mix. (Fossil Fuels, 2012)
Two different alternatives to retrieve energy other than fossil fuels would be to use solar/wind energy and geothermal energy. With fossil fuels diminishing or polluting the air, there are other natural resources that can be used and are just as beneficial and environmental friendly. With these renewable energy sources becoming more affordable, it is a considerable change but the disadvantages must be outweighed heavily in order to make it an adaptable change for everyone.
Windmill and turbines are becoming more prevalent in farms for rural areas and businesses. A small turbine can produce enough energy for a house or even an entire school. In order for the wind turbine to be effective, wind speed must be able to be able 12 to 14 mph, in order to generate electricity. (Energy Store, 2012) When turbines are grouped together, they are called wind farms and they are able to generate enough electricity to power a city the size of San Francisco.
Solar energy is also another means of gathering natural source of energy through the sun. It’s also the most environmentally friendliest. We can change the sunlight directly electricity using solar cells. Solar cells are also called photovoltaic cells, which can normally be found in calculators and or many small appliances. The advantage of solar energy is that once it recovers the initial investment, it is free. (Energy Store, 2012) One of the major disadvantages of solar energy is that the sun doesn’t always shine. And pollution impedes the suns access to solar panels.
Geothermal energy is energy that is sourced from beneath the Earth’s surfaces. The process simply works with an injection well that drills into hot rock. Water is then injected to create a fracture for a reservoir. Another well is then drilled that interests the fracture and distributes water that pulls the heat. Although they leave few carbon footprints, they are only available from certain region on the planet.
All these sources of energy help us create innovative ways to become more environmentally friendly and try to reserve as much fossil fuels and nonrenewable resources. One day we will run out of oil and fossil fuels take millions of years to develop. Scientists are finding more productive measures to get our energy and how to get it distributive among the world. It may take a mix of these sources, but I believe that one day, we won’t have to rely on fossil fuels anymore.

References
1. Definition of Thermodynamics - How Energy is Converted From One Form to Another. Find Science & Technology Articles, Education Lesson Plans, Tech Tips, Computer Hardware & Software Reviews, News and More at Bright Hub. Retrieved April 20, 2012, from http://www.brighthub.com/engineering/mechanical/articles/3251.aspx
2. Profiles--Fossil Fuels » Explore More: The Future of Energy. (n.d.). Iowa Public Television. Retrieved April 20, 2012, from http://www.iptv.org/exploremore/energy/profiles/fossil_fuels.cfm
3. The Energy Story - Chapter 1: Energy - What Is It? . (n.d.). Energy Quest Room. Retrieved April 20, 2012, from http://www.energyquest.ca.gov/story/chapter01.html

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