Prove or conversely disprove the inverse square law Essay Example for Free

Prove or conversely disprove the inverse square law Essay My aim of this experiment is to prove or conversely disprove the inverse square law, which simply states that the intensity of any point source, which spreads its influence equally in all directions without a limit to its range, will decrease in intensity inversely proportional to the square of the distance. Background information Research As first proposed by Isaac Newton when proposing his universal law of gravitation it became clear to him that the intensity of gravity would decrease according to the inverse of the square of the distance. This is the heart of the inverse square, which states for any point source, which spreads its influence equally in all directions without a limit to its range, will obey the inverse square law. Quite simply the inverse square law states that for sources emitted from a point the intensity will be deduced as the inverse of the square of the distance. You double the distance you reduce the intensity by a factor of 1/4. This has applications in electric fields, light, sound, gamma radiation, and gravity. All of these are expressed in the medium of a field. To explain the properties involved in a field it is useful to use the idea of flux. When water flows form a source to a sink it is transferred at a certain rate, or flux. The flux density will be the mass of water per second crossing a unit area perpendicular to the flow. We can think of energy density in a similar way. Energy flux density is normally referred to as intensity. Field strength and energy flux density are related. The strength of a field will fall off proportionally. The idea of flux can be applied to fields in which there is no obvious evidence for anything actually being transferred, such as static electrical fields, gravitational fields and magnetic fields. The mathematics that model flux are the same whatever the field. Generally this can be summed up in a formula which states the intensity at a point on a sphere of influence will be deduced by the source strength divided by 4 times pi times the radius squared, where this is the surface area over which the initial source has spread its influence. I = S / 4? r2 This formula manifests itself in a variety of ways when put into context. When applied to gravity the formula to show the acceleration due to gravity at the surface of a body is, 4? GM = Intensity at the surface of sphere of influence. Where G is the gravitational constant, M the mass of the object, and r the distance from the centre point. By cancelling out the 4? section we are left with the more elegant formula, GM = acceleration due to gravity r2 Where acceleration due to gravity would be equivalent to the intensity of the source. As the distance is doubled, the intensity is reduced by a factor of 4. So theoretically gravity obeys the inverse square law. When applied to sound we get the formula, P = I 4? r2 Where P is the source power, I the intensity at surface of sphere, and r the distance from the source power. So again we see that as we double the distance we reduce the intensity by a factor of 4. The differce here that as sound is not of ethereal nature it is affected by its surroundings and only works without reflections, or reverberations. The behaviour of point charges in an electrostatic field will obey coulombs law, which in turn obeys the inverse square law. The formula here is, Q = E 4 0 r2 Where Q/? 0 is the source strength, E is the strength of the electrostatic field, and r is the distance. So again we see that as the distance is doubled, the intensity of the field is reduced by a factor of four.

Structural Elements of Toni Morrisons The Bluest Eye Essay -- Bluest

The Bluest Eye: Structural Elements In The Bluest Eye, Toni Morrison employs structure as an aid for telling her story. She uses at least three unique structural devices for this purpose. First, Morrison begins the novel with three passages that prepare the reader for the shocking tale about to be told. Second, the novel is divided into four major parts with each quarter given the name of a season. Third, the novel is further divided into seven sections that are headed by a portion of the passage that began the novel. The three passages that begin The Bluest Eye appear to be from a grade school primer. They portray a family's life in identical terms, but they differ in punctuation, capitalization, and spacing. The first passage is normal in all of these aspects: Here is the house. It is green and white. It has a red door. It is very pretty. Here is the family. Mother, Father, Dick, and Jane live in the green-and-white house. They are very happy. See Jane. She has a red dress. She wants to play. Who will play with Jane? The second passage lacks punctuation and capitalization Here is the house it is green and white it has a red door it is very pretty here is the family mother father dick and jane live in the green-and-white house they are very happy see jane she has a red dress she wants to play who will play with jane The third passage lacks all --- punctuation, capitalization, and spacing. According to Herbert Rice, "what appears on the page is quite literally a chaotic array of letters" (19): Hereisthehouseitisgreenandwhiteithasareddooritisveryprettyhereisthefamilymotherfatherdic kandjaneliveinthegreenandwhitehousetheyareveryahppyseejaneshehasareddressshewantsto playw... ...have a few parallels in their lives: both are searching for someone to play with them, and both find the answer in a friend, although Pecola's friend is imaginary. The Bluest Eye is an innovative novel whose touching and compelling story could not have been told without Morrison's unique structural devices. One such tool is the use of seasons to divide the narrative and put an interesting twist on the order of events. Perhaps the most unique structural element is the three primer passages that begin the novel. The first passage introduces a model household to which the rest of the families in the novel are compared. Finally, an equally innovative structural element is the use of lines from the primer passages to head subsections in the novel, illustrating the vast differences between the mythological Dick and Jane world and the reality of black family life.

Introduced to the children Essay

Nowadays, there are so many children television shows introduced to the children. Which are being interactive in a way and the children are enjoying and learning (without them knowing it). One of these shows is the â€Å"Dora the Explorer† of NickJr. , which is very popular nowadays. As it was described the show was created â€Å"†¦starring a 7-year-old Latina girl and her friends. The show is designed to actively engage preschoolers in a play-along, computer-style adventure. † [About Dora the Explorer (n. d. ),Retrieved November 10, 2007from www. nickjr. com/shows/dora/about_dora. jhtml. ] In this particular episode, when Dora received her backpack as a gift from her parents. It was her mother who informed her that she has a present from them. Like a common mother who is loving and caring to her child she was so proud in informing Dora of the gift. While the father is very proud to present the gift to her and telling her all about the backpack. Of how special it is, as her mother had mentioned. The father informed Dora that all she needs is inside the backpack. There are thirteen characters in this episode and mostly are males, only five characters are female including the main character Dora. Comparing with the other female characters, Dora is what you might say of the strong character. As earlier mentioned, he mother is the loving and caring person of her child. While her backpack which was represented by a female voice, represents exactly what is Dora’s character. Also the library’s door is being represented by a female voice, which only shows how friendly and approachable a library is. As for the librarian, we all know that the usual librarian is a female. It is well represented, as a librarian who is friendly, knows who regularly goes to the library. And knows how many books are to be returned by the borrower. While the male characters, are well represented. The father, who cares and loves her daughter, knows what’s best for her. Boots, a caring friend and assistant to Dora always follows her wherever she goes. Though there are times that he gets in trouble, Dora always helps him get out of it. While Drool who doesn’t like anyone to cross his bridge, is like Scrooge. He gives them riddle to solve and if they can’t answer correctly they can’t pass through. While, Swiper the Fox, Dora’s enemy

Animal Testing is Cruel - 1340 Words

All around the globe, animal testing has been the most controversial and frequently debated topic. Animal testing is cruel, however, it has helped us develop and become more advanced in sciences and technology. Below are the points and reasons for and against the motion, discussed to help you pick your side. Issues related to animal experimentation are frequently discussed these days, particularly in the media. It is often said that animals should not be used in testing because it is cruel and unnecessary. This essay will examine the arguments for and against animal testing. A reason against would be that without doubt, animal testing is gruesome and exceptionally vicious. We basically put animals through torture for our benefit and selfish reasons. We talk of how ‘justice should be served’ all the time, but isn’t this unfair? Aren’t we snatching away animal rights? Aren’t we exploiting helpless animals? First and foremost, animal experiments are unkind and cause animals a lot of pain. In addition, they feel that many tests are not really important, and in fact animals are not only used to test new medicines but also new cosmetics, which could be tested on humans instead. Another issue is that sometimes an experiment on animals gives us the wrong result because animals’ bodies are not exactly the same as our own. As a consequence, this testing may not be providing the safety that its proponents claim. Many would say animal testing would be useful because it saves the livesShow MoreRelatedAnimal Testing Is Wrong And Cruel Animals1195 Words   |  5 Pageshas made me realize that animal testing is wrong and cruel to animals. I will be going over some of the history of animal testing, giving examples of some of the tests that are being performed, and mentioning some of the laws and acts created. While reading through this think is this test necessary when the animals will be put through cruel procedures. This is why I think that animal testing should be reevaluated to see if it is really worthwhile. What is animal testing some people ask, and whyRead MoreAnimal Testing Is Cruel And Inhumane1323 Words   |  6 PagesThousands of animals every year are euthanized due to animal testing. Animal testing is cruel and an inhumane way to torture animals for mankind’s own benefit. Because of our selfish, millions of animals suffered a vicious and painful death in the name of research every year. Animals are frequently used in biological and medical research, in the testing of drugs and commercial products, and in educational exercises in the sciences. So, can we ask ourselves, deeply in mind, that is it worth to useRead MoreAnimal Testing Is Cruel Or Beneficial?1154 Words   |  5 PagesDo you know what happens behind the closed doors of scientist labs? You probably do not because of the cruel things that animals go through every day. People probably don t think this is a big deal, but I am neutral on the subject. But, I do see the wrong and right things that are happening. Ani mals are taken advantage of in terrible ways every single day in scientists labs all around the world. But, they help us with many health benefits. Health benefits at could change and even cure some diseasesRead MoreAnimal Testing Is Cruel And Inhumane1229 Words   |  5 Pagesuse of animals to carry out the tests before implementing the solution for human beings. The idea has always served as a disadvantage for the animals citing the pains and strains that they undergo during such processes. After keen observation of the experience of the animals, individuals developed varying opinions of whether to be in support of the practice or against it. Animal testing is cruel and inhumane Animal testing serves in promoting cruelty and inhumanity among the animals. In theirRead MoreCruel Methods Of Animal Testing2812 Words   |  12 PagesWhy do U.S companies still use cruel methods of animal testing despite The Animal Welfare Act of 1966? Millions of animals are used in painful experimentation yearly. Animals such as rabbits, dogs, cats, guinea pigs and monkeys are used in extreme testing for drugs, cosmetic and household products.(http://www.animalresearchcures.org) In the United States, no matter how cruel, pointless or painful an experiment is, it is always legal. The usage of animals in research goes way back to the early 1900’sRead MoreCosmetic Testing with Animals is Cruel Essay1302 Words   |  6 PagesCruelty of Cosmetic Testing on Animals    Each year, thousands of animals are brutally tortured in laboratories, in the name of cosmetic research. A movement to ban animal testing for cosmetic purposes has been gaining popularity, with many companies hopping on the bandwagon against this research. New alternatives have been developed to eliminate the necessity to test on animals. This is only a small beginning of what is necessary to end these immoral acts. Animal testing in cosmetics is uselessRead MoreAnimal Testing: a Cruel and Inhumane Way881 Words   |  4 PagesAnimal Testing Mariana Alexandra Anaya Martà ­nez Universidad del Valle de Mà ©xico Additional language to Spanish III Dinorah Rodriguez November 12, 2012 Right now, millions of animals are locked inside cold barren cages in laboratories across the world. They languish in pain, ache with loneliness, and long to roam free and use their minds. Instead, all they can do is sit and wait in fear of the next terrifying and painful procedure that will be performed on them. Animal testing is cruelRead MoreAnimal Testing Is Cruel And Unusual Punishment2041 Words   |  9 Pagesan emotional debate over the use of animals in pharmaceutical research. The core question is whether animals have moral rights and if they should be accepted and protected by humans. This is widely philosophical question, but the answer has many possible consequences. For example, if any animal of any species has a right to life, then should it be wrong to kill them? If animals have a right to freedom, then is it be wrong to hold them in captivity? If animals have a right to happiness and securityRead More Animal Testing is Unnecessary and Cruel Essay example480 Words   |  2 Pagesdown a rabbits throat is effective. Testing on animals is a highly disagreeable process that should not be allowed. An animal is a living thing and so is a human. They eat, sleep, and live their life. Animals have rights. Why is it allowed that animals have to suffer so a human can use Windex? It has been proven that animals are still used to test items like cleaning products, which help humankind, less than medicines or surgery. Another point why animal testing is wrong is because of the brutal