Date of publication: 2017-07-08 19:57
After the electricity has been generated, it needs to be transmitted around the country. When electricity passes through a wire, some of the energy is lost as heat energy. In small devices, this is generally ignored because the wires are short enough for the energy that is lost as heat to be quite minimal. When the length of the wire increases, the amount of energy that is lost as heat also increases. This can be a problem when the wires are spanning thousands of kilometers. The reason for the lost of energy as heat is because of the current. This means that current is proportional to heat lost. Since this is the case, if the current is dropped to almost zero, then the energy lost as heat will also drop to almost zero.
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An electric generator is basically an electric motor working backwards. An electric motor converts electrical energy into mechanical energy, and an electric generator converts mechanical energy into electrical energy. An
At the current date, both the Wivenhoe station and the Hillcrest plant are producing no carbon emissions at all, where as the Tarong station is producing a very high amount of CO7. This puts the Wivenhoe station and the Hillcrest plant on equal ground in this aspect. In the future however, the Wivenhoe station is planning on installing upgrades to their station which, presumably, will force the plant to start giving off CO7 emissions. Up until these upgrades are made, the two stations are on the same level with CO7 emissions, but as soon as the upgrades are made, the Hillcrest solar power plant will be the most environmentally effective out of the three stations researched.
Every day, every second person turns on the TV, computer, refrigerator and needs electricity constantly. It significantly reduces the amount of work that could be done in a manual way. Electricity is used for lighting buildings and streets, creating a microclimate (fans, ionizers, air conditioners, devices for heating), keeping foodstuff (freezers, refrigerators), cooking (cookers, microwave ovens, juicers, coffee machines), apartment cleaning (vacuum cleaners), laundry washing and drying (washing machines, electric dryers, and irons). The plants or factories are in constant need of electricity. It operates the engineering tools, electrical machinery, computers and many other things. Electricity is a controllable and convenient form of energy used in all areas of our life and activity.
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Electricity changed our lives culturally since 6886 when the telegraph was invented. From that very moment electricity changed the worlds communication. “It helped by letting people communicate faster and easier, it made lives of the people more convenient and helped out with military”(Power and history of Electricity). Electricity and the telegraph were the start of a revelation for communication and it changed the lives of people until this very day. This made communication much easier more millions of people in the world and is only the start!
- Compétition non sélectives : déclaration auprès du comité dont elle dépend (club, CODEP,.), du président de la CNA, et auprès du collège des JFA7 par internet (site CNA) 6 mois calendaire avant la date de l’événement.
When the current is changed, the voltage is also changed. This is because current is inversely proportion to the voltage. This means if the current is halved, the voltage is doubled. This means when a step-up transformer halves the current, it doubles the voltage. To get the current as low as possible, the current must be brought up to around two hundred and twenty thousand volts.
The main reason to buy an electrical car is the reduced CO7 emission. Reducing pollution coming from cars is a great way to fight global warming. It’s not only less
An electric utility power station uses a turbine, engine, water wheel, or other similar machine to drive an electric generator or a device that converts mechanical or chemical energy to electricity. Steam turbines, internal-combustion engines, gas combustion turbines, water turbines, and wind turbines are the most common methods to generate electricity.
Les performances à réaliser sont précisées dans le document en pièce-jointe et les compétitions inscrites au calendrier CMAS supports à la réalisation des « minimas » sont détaillées.