Research
Electromotive Force
The definition of Electromotive force is the electric potential generated by an electrochemical cell or a changing magnetic field. Electromotive force is also known by the acronym emf, EMF, a cursive letter E or the SI unit that is used for electromotive force, volts. (http://chemistry.about.com/od/chemistryglossary/g/Electromotive-Force-Definition.htm)
Uses for batteries
• Toys
• Computer mouses
• Cars
• Off-grid power supply
• All battery powered devices.
• Hearing aids
• Cell phones
• Flash lights
(http://electronics.howstuffworks.com/everyday-tech/battery.htm)
Battery Powered Devices
3 billion batteries are purchased each year in the United States alone! Most of these batteries will eventually get thrown away and the result of this being that 10 billion or more batteries are thrown away each year by the global population! Why not be more efficient? It would save the environment in many ways if we could dramatically reduce this number by simply finding the most efficient and cost effective batteries.
Useful Information about how to save the battery
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A light bulb) and the circuit is complete. The electrolyte in the battery oxidises the powdered zinc in the anode. The manganese dioxide/ carbon mix in the cathode reacts with the oxidised zinc to produce electricity. The collector moves the electrical current out of the battery to an external circuit (eg. light bulb from a flashlight). As the battery is drained and the anode (zinc) oxidises, the cathode (manganese dioxide) is reduced. The contact between the electrolyte and the zinc produces reaction products, which gradually slow down the battery, lowering the voltage. During this process the available manganese dioxide depletes, becoming less active. These are the factors that cause a battery to lose its
When a car battery dies most people will take it to a shop or store that carries their brand of battery and turn in the old battery for a core fee, what happens afterward is the battery will be recycled. Vehicle batteries consist of a lead and acid content; Ninety-three percent (93%) of the content can be recycled, but the seven (7%) accounts for 42,000 tons of lead being released into the environment because the lead does not break down like the other
In the end, the greatest way to help is by spreading awareness. Help spread the word by telling everyone you know about the greenhouse effect and global warming. By making them see what is at stake, and ask them to help save our planet. Encourage others to conserve and share information about recycling and energy conservation with your co-workers, friends, neighbors, and family. Recapping what can be done we all should get out there and plant some trees and plants so we can help the greenhouse gasses to decrease. Reduce the emissions from household products by turning them off. Most importantly remember to spread the word and the three R’s: Reduce, Reuse, and Recycle!
In contrast, most renewable energy sources produce little to no global warming emissions (“Benefits of Renewable Energy Use”). Coal mining and lumber harvesting would also be reduced by the switch, which in turn would improve the forest and ecosystem surrounding these power plants. Animals will also benefit from the change to clean energy. It is often reported that animals are constantly displaced and injured by the different forms of energy we are currently using. Andrew B. Gill performed a study and wrote a journal article on the conservation of wildlife and their habitats; the results of his study were conclusive that something needs to be done to change the current state of our energy resources.
Not spending money on gas for the rest of your life is a huge selling point for many people. The problem is that recharging your car takes so long that sometimes it is not even worth it. Electric cars are also very good for our environment. Electric cars can help the environment by not emitting harmful gases and hurt our atmosphere in any way.
Some other reasons for the popularity of Lithium-Ion Batteries is that they hold their charge over a long period of time. A Lithium-Ion Battery loses only 5% of the battery’s charge per month while a Nickel-Metal Hydride Battery loses 20% of the battery’s charge per month. Finally, Lithium-Ion Batteries are designed so they can be charged at any time, even if the battery was not at zero percent to begin with (Howstuffworks, 2009).
Electrolysis is the only permanent hair removal methods that can help you achieve and maintain a smooth, hair-free beautiful aspects. This is a convenient, low-Charge strategy to refresh your image, increase your confidence and enhance Your enjoyment of life everyday.
Michael Faraday was the man behind the discovery of electromagnetic induction. Electromagnetic induction is the creation of an electric current by using a magnetic field. Faraday’s first experiment was set up by coiling to separate lengths of copper wire around a wooden block. The two coils had to be separated he did this with thread. One of the coils was connected to a galvanometer (an instrument used to detect small electrical currents), while the second coil was connected to a battery and switch. As Faraday closed the switch there was a small and brief change in the reading on the galvanometer. What this meant was that Faraday had seen a little and concise current that passed through the galvanometer circuit. Faraday observed the same affect in the galvanometer circuit when the battery circuit was turned off, except the change was in the opposite direction or negative of the first reading of the galvanometer.
In conclusion, the best type of battery varies depending on the certain situation. For instance, lithium-ion cells are best for cellphones while lead-acid cells are best for automobiles. Each type of battery has their own advantages and disadvantages, so sacrifices must be made. The chosen battery will depend on the design specifications and requirements.
Based on Laurel Nesbit, a program assistant in the Office of Sustainability here at UF, our campus manages to utilize 470,000 Megawatts of energy annually. This figure is generated from all the energy-consuming gadgets that operate on our campus on a daily bases. These gadgets include computers that are left turned on over the night even they are not in use, copiers, and the fume hoods in our laboratories. Admittedly, the success and the health of wellbeing of the students is contingent upon some of these equipment. For instance, the laboratories need the fume hoods in order to keep the experimenters safe. Instead of casting these necessities away, we can develop alternatives which will be capable of generating energy in order to compensate for the electricity that we endlessly
People can also reduce the use of fossil fuels by doing simple things for instance switching off lights and appliances when leaving the room. Walking or cycling instead of driving a car or use public transport for maybe longer journeys. Little things like this will make a big difference, making our planet a better place.
I have already written about the obvious benefits of going solar. There are other benefits as well that decrease the impact on our earth over time. Solar panels and battery banks have a life of 25-35 years and don't need anything more than general cleaning, snow removal and monthly water filling. Solar energy is the cleanest and purest form of energy, allowing for cleaner air overall in our environment. There is great hope for a lot more solar panels to be installed worldwide.
In this case study I will be discussing advantages and disadvantages of electric cars. Electric cars are cars that are powered by electricity. Electric vehicles are an important part of cutting emissions and reducing global warming. The battery of an electric car stores electrical energy. The electric motor is coupled to the wheels through gears; it converts 59-60% of electrical energy into the wheels. The battery runs the motor which allows the car to move. Electric cars are necessary as they will save money, because electricity is cheaper than gas. Also electric vehicles will help reduce global warming and pollution. However, some people say that electric cars still have environmental costs. The electricity used to recharge EV batteries has to come from somewhere in the world, and now, most electricity is generated by burning fossil fuels. Although electric vehicles are classified as green cars, purists will not appreciate the toxicity of the batteries.
Humans these days take electricity for granted. We don’t truly understand what life was like without it. Most young adults will tell you their life does not depend on electricity, but they aren’t fooling anyone. They all know that their life depends on electricity; whether it’s television, their phone, Google, or the lights in their house. We need to stop taking those things for granted and give credit where credit is due. That is why I chose to write about the scientists who contributed to the discovery of electricity, which then helped modern scientists fuel the electricity phenomenons we now have today.
The phenomenon called electromagnetic induction was first noticed and investigated by Michael Faraday, in 1831. Electromagnetic induction is the production of an electromotive force (emf) in a conductor as a result of a changing magnetic field about the conductor and is a very important concept. Faraday discovered that, whenever the magnetic field about an electromagnet was made to grow and collapse by closing and opening the electric circuit of which it was a part, an electric current could be detected in a separate conductor nearby. Faraday also investigated the possibility that a current could be produced by a magnetic field being placed near a coiled wire. Just placing the magnet near the wire could not produce a current. Faraday discovered that a current could be produced in this situation only if the magnet had some velocity. The magnet could be moved in either a positive or negative direction but had to be in motion to produce any current in the wire. The current in the coil is called an induced current, because the current is brought about (or “induced”) by a changing magnetic field (Cutnell and Johnson 705). The induced current is sustained by an emf. Since a source of emf is always needed to produce a current, the coil itself behaves as if it were a source of emf. The emf is known as an induced emf. Thus, a changing magnetic field induces an emf in the coil, and the emf leads to an induced current (705). He also found that moving a conductor near a stationary permanent magnet caused a current to flow in the wire as long as it was moving as in the magnet and coiled wire set-up.
Electricity has become a basic necessity for most people all over the world. We are depending on electricity for our everyday lives and if one day we did not have electricity we would have difficulty going through the day. I think we need to be more dependent on things that do not use electricity and only use electricity sometimes as a treat so just in case if one day electricity all goes away we could still live comfortably and still have a great life even without it.