1 HSC PHYSICS > MOTORS AND GENERATORS| AC & DC Gather secondary information to discuss the advantages and disadvantages of AC and DC generators and relate these to their use. AC generators Advantages The slip rings of an AC generator have a continuous surface that allows the brushes to remain in contact with the ring’s surface. Thus the brushes in an AC generator do not wear out as fast as in a DC generator as they do not create an electric short circuit every half-turn. Therefore
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Nowadays information is accessible to almost everyone in this world. We can exchange ideas and broaden our horizon with the help of the means of communication & Media such as comics‚ books‚ radio‚ television‚ film or theatre. However‚ I believe not all these provide good quality information and I will try to analyze them. First of all‚ I would like to compare two ways of broadcasting information‚ namely TV and books. In my opinion‚ books are much more useful than Tv is and I believe there are
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Virtually any medium can be used for advertising. Commercial advertising media can include wall paintings‚ billboards‚ street furniture components‚ printed flyers and rack cards‚ radio‚ cinema and television adverts‚ web banners‚ mobile telephone screens‚ shopping carts‚ web popups‚ skywriting‚ bus stop benches‚ human billboards‚ magazines‚ newspapers‚ town criers‚ sides of buses‚ banners attached to or sides of airplanes ("logojets")‚ in-flight advertisements on seatback tray tables or overhead
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Prohibition in the United States‚ also known as The Noble Experiment‚ was the period from 1920 to 1933‚ during which the sale‚ manufacture‚ and transportation of alcohol for consumption were banned nationally[1] as mandated in the Eighteenth Amendment to the United States Constitution. Under substantial pressure from the temperance movement‚ the United States Senate proposed the Eighteenth Amendment on December 18‚ 1917. Having been approved by 36 states‚ the 18th Amendment was ratified on January
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The computer is one of the most important inventions in the 20th century‚ which has changed our lives since it was first introduced. It is undeniable to say that the computer has resulted in both positive and negative effects which must be addressed accordingly. To begin with‚ the computer has contributed to our lives in many beneficial ways. The main use of computers is to help us store and organize information even tons of files within hard disk drives. Thanks to the advancement in technology
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Uber Uber is a private transportation company‚ it is also cheaper‚ friendlier‚ cleaner and more trustworthy than getting a taxi. Customers seem to like it more than the taxis but they seem not to like that so instead they stand in the way between uber so they don’t become a bigger and better company then what they are. Ubers service in Australia has grown really quick which is a really good thing because it’s not an Australian company‚ uber comes from the states where it all started in San Francisco
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Nanotechnology‚ the manipulation of matter at the atomic and molecular scale to create materials with remarkably varied and new properties‚ is an expanding area of research with much potential in many sectors‚ such as healthcare or construction and electronics. In this article ‚ I will briefly explain to you some parts of this complicated subject. In the medicine‚ Nanotechnology pledges to revolutionize drug delivery‚ gene therapy‚ diagnostics‚ and other areas of research‚ development and clinical
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Describe the Advantages and Disadvantages of using Referendums in the UK? (25 marks) A referendum is a vote given to the public which is determined by the government‚ and is used to help answer an important political or constitutional question to which the public must vote a simple ‘yes’ or ‘no’. One advantage of using referendums in the UK is that they enable the public that are over 18 to approve or disprove important constitutional changes. An example of a one being used for this purpose is
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Genetic Engineering / Advantages and Disadvantages During the latter stage stages of the 20th century‚ man harnessed the power of the atom‚ and not long after‚ soon realised the power of genes. Genetic engineering is going to become a very mainstream part of our lives sooner or later‚ because there are so many possibilities advantages (and disadvantages) involved. Here are just some of the advantages : * Disease could be prevented by detecting people/plants/animals that are genetically prone to
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Civil War broke out‚ the Confederacy and the Union both had numerous advantages and disadvantages and there were multiple women and slaves that contributed to the war. To begin with‚ the Confederacy had its significant advantages that helped it push through the war‚ one of which was its strong leaders. Many believed “Stonewall” Jackson and Robert E. Lee were some of the best officers even before the war. Also‚ they had the advantage of fighting on their own soil. They knew the terrain better that
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