Free Essays on An Overview Of SRBs And Their Application In A Shuttle Launch

Have you ever seen a spaceship before launch? If you so I’m sure you have noticed the two cylindrical objects with the cone tops mounted on the side of the space shuttle. Those are Solid Rocket Boosters (SRBs). SRBs are very useful to do many tasks. Not only does NASA use the technology of SRBs, they are used every where, even a long time ago. Did you know that SRBs were the first engines created by man? They were invented hundreds of years ago in China and have been used ever since. Even in the National Anthem the line about "the rocket's red glare" is talking about small military SRBs. Let’s have a look at how these SRBs got to be so useful and how they are made. The idea behind a simple SRB is straight forward. What you want to do is create something that burns very quickly but does not explode. As you are probably aware, gunpowder explodes. It is because of there innate properties SRBs are very safe, with a low cost to produce and relatively simple. In a small model rocket engine or in a tiny bottle rocket the burn might last a second or less. In a Space Shuttle SRB containing over a million pounds of fuel, the burn lasts about two minutes. Also since it is a chemical reaction there is no way of stopping it from burning once it has started. The composition of most common SRBs are a combination of: ammonium perchlorate (oxidizer, 69.6 percent by weight), aluminum (fuel, 16 percent), iron oxide (a catalyst, 0.4 percent), a polymer (a binder that holds the mixture together, 12.04 percent), and an epoxy curing agent (1.96 percent). Along with the main load of fuel the space shuttle SRBs have an onboard recovery system, parachutes, floatation devices, signaling devices, and explosive charges for separation. The SRBs mentioned above provide most of the thrust (71 percent) needed to lift the space shuttle off the launch pad. This seems like an easy task, but it’s not easy getting something that big off earth. Letï ¿ ½... Free Essays on An Overview Of SRBs And Their Application In A Shuttle Launch Free Essays on An Overview Of SRBs And Their Application In A Shuttle Launch Have you ever seen a spaceship before launch? If you so I’m sure you have noticed the two cylindrical objects with the cone tops mounted on the side of the space shuttle. Those are Solid Rocket Boosters (SRBs). SRBs are very useful to do many tasks. Not only does NASA use the technology of SRBs, they are used every where, even a long time ago. Did you know that SRBs were the first engines created by man? They were invented hundreds of years ago in China and have been used ever since. Even in the National Anthem the line about "the rocket's red glare" is talking about small military SRBs. Let’s have a look at how these SRBs got to be so useful and how they are made. The idea behind a simple SRB is straight forward. What you want to do is create something that burns very quickly but does not explode. As you are probably aware, gunpowder explodes. It is because of there innate properties SRBs are very safe, with a low cost to produce and relatively simple. In a small model rocket engine or in a tiny bottle rocket the burn might last a second or less. In a Space Shuttle SRB containing over a million pounds of fuel, the burn lasts about two minutes. Also since it is a chemical reaction there is no way of stopping it from burning once it has started. The composition of most common SRBs are a combination of: ammonium perchlorate (oxidizer, 69.6 percent by weight), aluminum (fuel, 16 percent), iron oxide (a catalyst, 0.4 percent), a polymer (a binder that holds the mixture together, 12.04 percent), and an epoxy curing agent (1.96 percent). Along with the main load of fuel the space shuttle SRBs have an onboard recovery system, parachutes, floatation devices, signaling devices, and explosive charges for separation. The SRBs mentioned above provide most of the thrust (71 percent) needed to lift the space shuttle off the launch pad. This seems like an easy task, but it’s not easy getting something that big off earth. Letï ¿ ½...

Dreams in Book 5 of Paradise Lost Essay Example

Dreams in Book 5 of Paradise Lost Essay Example Dreams in Book 5 of Paradise Lost Essay Dreams in Book 5 of Paradise Lost Essay Essay Topic: Paradise Paradise Lost Paradise Lost Books 5 and 6 Book five of Paradise Lost opens with Adam and Eve sleeping. An interesting event in this section was Eve’s dream. The dream is a foreshadowing to what will later happen in Eden thanks to the tree of knowledge. The dream sequence is a theme that happens in many forms of literature. The dream sequence is found in Death of a Salesman and also in the New Testament. Something always happens due to dreams and this is why Carl Jung and Freud wrestled with the concept so much. Dreams often warn people of what will come and also give insight into what people are going through. In literature dreams serve as a link to a person’s thoughts and actions. Eve’s dream is planted in her by Satan. Satan whispers in her ear, while she sleeps, of the goodness of the tree and all the powers that come with it. Satan tells Eve that with the knowledge she could be a Goddess. More proof that the dream is foreshadowing is that God sent Raphael immediately to share with Adam and Eve knowledge with the hope that they would not fall due to ignorance. However it was too late because the greatness of the fruit was already presented to them through the dream. Dreams have always been important in the Christian faith. In the Old Testament Joseph interpreted dreams of the Pharaoh. Joseph was called for, and interpreted the dreams as foretelling that seven years of abundance would be followed by seven years of famine, and advised Pharaoh to store surplus grain during the years of abundance. Before Joseph was 30 years old, Pharaoh made him viceroy over Egypt. He then later helped his family out that had previously sent him away. Another set of dreams that were influential in Christian faith were the dreams that Joseph and Mary had before Jesus was born. Whenever something important needs to be told a dream is created. Carl Jung was a philosopher that dealt with dreams. In his view dreams are the direct, natural expression of the current condition of the dreamer’s mental world. This would explain Eve’s dream and her eventual fall. Jung rejected Freud’s claim that dreams intentionally disguise their meanings, rather Jung believed that the nature of dreams is to present self portrayal. Using this viewpoint the dream in Book Five would be a thought that Eve had but never realized it until her dream Dreams provide knowledge that one has but has not experienced that knowledge. Dreams are messages in Christianity sent from God. Using dreams is an easy way for Gog to connect and express his views with followers and non followers. This practice can work, but only if Satan does not plant a dream first. As found in Book Five, if Satan implants a dream first or thoughts first the outcome can be fatal.

Comparing Essay Example | Topics and Well Written Essays - 500 words

Comparing - Essay Example During those years, Donald performed well both in academe and social relations. In 1964 he graduated and pursued his college education in Fordham University. He then transferred to Wharton School of Finance at the University of Pennsylvania where he learned accounting and finance. Trump graduated with a degree in economics. While working with his father during the summer time, he also learned the principle of money making, mortgages and construction works. He then joined his father's company and became the president of it in 1975. He changed the company's name to Trump Organization. He built a billion-dollar empire with his name branded on it. These were the Trump Tower, Trump Plaza, Trump Plaza Hotel, and Casino, Trump's Castle, Trump Parc and Trump Place. Thus, his name Trump was synonymous with wealth, luxury and prestige. He loved to utilize attractive architectural designs that would earn high profit and win public recognition. He was well known as the entrepreneur who found, bought and turned around losing properties. Just like Trump himself I also would like to have an empire of my own, and I do try to work on my thoughts to bring them to realization. Aside from his great achievements during his early career life, he also experienced downfall times when the real state market went down.