Monday, August 24, 2020

What Makes a Good Friend

As I would see it an old buddy is somebody who is consistently around you. Another quality for an old buddy is somebody who lets you hand truck cash on the off chance that you cart them cash. The last quality is somebody who does favors for you in the event that you do favors for them. The principal quality to an old buddy is somebody who is consistently around you. Spending time with one another. Something else is messaging them constantly. Likewise, playing computer games. The exact opposite thing is going out to see the films. The subsequent quality is somebody who gives you cash on the off chance that you give them cash. A few models are the point at which I go to McDonalds or Subway and I don’t have cash my companion gives me cash and on the off chance that he doesn’t have cash I will pay for him. Additionally my companion consistently drives me around and I generally give him cash for gas. The last great quality for a companion is somebody who does favors for you on the off chance that you do favors for them. For instance: in the event that I give him cash he gives me cash, on the off chance that I help him on schoolwork he causes me on schoolwork, on the off chance that I get him lunch he gets me lunch. An old buddy is somebody who is consistently around you. Somebody who lets you hand truck cash in the event that you pushcart them cash. Somebody who does favors for you in the event that you do favors for them. Those three characteristics are the principle three characteristics that I am searching for in a companion.

Saturday, August 22, 2020

Schools as Organisations

6. 2 Explain the job of schools in national arrangements identifying with kids, youngsters and families. As a feature of the National Governments motivator to help give sponsorship and consolation to experts in schools 2 new subsidizing programs were presented by the Department for Children, Schools and Families as part f the Government Children Plan. These projects; Every Child a Talker (ECAT) and Social and Emotional Aspects of Development (SEAD). These were propelled to expand the aptitudes of early year’s masters and were a piece of the government’s more extensive promise to the instruction workforce advancement. These bundles were intended to address the requirement for youngsters in schools to encounter a language rich setting through staff in guaranteeing that they work effectively with the two guardians and families. Through SEAD, staff in schools would pick up the information and comprehension to help draw in guardians all the more adequately with the goal for them to be more ready to help their child’s social and passionate needs. It was the maltreatment and extreme passing of Victoria Climbie in 2000 which provoked changes in children’s administrations. The Every Child Matters paper set out a national motivation and plan with the point of offering more types of assistance that were available for the requirements of kids, youngsters and families which expressed that schools and other kid care suppliers must show ways that they could progress in the direction of every one of the results. The 5 key points and aims were; Be sound: schools expected to have a main influence in wellbeing instruction towards youngsters and youngsters which included scrutinizing the hugeness of tidbits and the dietary substance of school dinners, just as empowering kids to appreciate a decent physical and psychological wellness by being a piece of a solid way of life. Remain safe: a review among 11~16 year olds in standard schools guaranteed that practically 46% had been the casualty of some type of harassing, so as to break these measurements it is essential that students need to feel that they are being ensured in school, with the end goal for schools to do this they should keep on making conduct the board and hostile to tormenting a critical issue. Appreciate and accomplish: with the goal for understudies to capitalize on life and build up the vital aptitudes for adulthood youngsters and youngsters must make the most of their lives and accomplish their latent capacity. With the goal for schools to help with this they should make upgrades in failings across various ethnic gatherings and unapproved unlucky deficiencies that are unsuitable. Contribute: youngsters and youngsters should be associated with their locale as opposed to include themselves in hostile to social conduct. Schools can show youngsters the morals of social duty and a sentiment of ‘belonging’ by giving connect to an understudies own locale and how they can turn into a piece of it. Accomplish a decent way of life: youngsters and youngsters with guardians who are jobless or existing on low wages must be urged to seek to a superior profession and way of life for themselves. Schools can create procedures to empower all understudies to arrive at their maximum capacity. At Parkhill School we are a piece of a stroll to class program which energizes students at the school to walk as opposed to take different types of transport, for each kid who takes an interest they are granted with an alternate identification toward the finish of every month which they gladly show on their packs. We likewise are a piece of War Child International; this is a cause which works over the world to help kids that are influenced by war. Every Christmas the kids at our school are approached to furnish a shoe box loaded up with things that would be reasonable for a kid living in a war torn nation. The kids feel a lot of satisfaction and joy when they realize they are helping a kid and that gives them a feeling of acknowledgment about youngsters who have much not as much as themselves

Friday, July 24, 2020

How Long Should Your HIIT Workouts Actually Be

How Long Should Your HIIT Workouts Actually Be We all know how important it is to be in a good shape, not just for good looks, but also for our health. It is very important to adjust your diet to be healthy and strong.Therefore, it is crucial to choose a diet that would have a high impact on our productivity and energy.But as much as we eat healthily, sometimes it is not enough to lose enough weight, at least not as much as we would want to.Therefore, the only solution to that problem is a good old workout.Yes, we can go for long walks and steady jogging, but if we wanted to lose weight faster and improve our physical ability and condition, we would require much more intensive training than just a simple walk.That is why we are here today to introduce you to a very specific type of training, called “high-intensity interval training”, or in short HIIT.We will explain what HIIT exactly is, why it is scientifically proven to be very useful and how it helps us reduce our weight faster.After that, we will give some hints on how lo ng should HIIT last, give some workout examples and mention some possible flaws of this type of training.That said, stick with us and let us begin!WHAT DOES HIIT STAND FOR?As mentioned above, HIIT is an acronym of High-Intensity Interval Training.It is a technique of training where you do an exercise faster at a higher intensity for a specific amount of time, then swap to doing the exercise in a slower pace, by reducing its intensity, also for some time.A good example of HIIT I tend to use is running 1 minute at full speed, then walking for a minute, then increase the speed slightly for some time and then doing the sprint again for 15 to 30 seconds, depending on how tired I am.Of course, the workout doesn’t stop after just one cycle, but continues for a couple of cycles, depending on how many of them you can do.Try to aim for around 7-10 cycles.Basically, what you do, is swapping from faster to slower exercise in a couple of minutes.That type of workout helps with boosting up your stamina and eventually, you should be able to hold much longer and to do several more cycles.One of the people who has contributed the most to the use of HIIT workouts instead of using normal cardio workouts is Japanese scientist Izumi Tabata.With the popularity of his research, he managed to popularize the overall technique with the type of HIIT interval called “20 seconds exercise, 10 seconds rest”.You can find out more about Tabata exercise in the video below. It is a very popular HIIT exercise used throughout the world by both professionals and amateurs.Tabata exercise is considered the best HIIT workout when we consider the time needed to perform it, which is only 4 minutes.Therefore, it is very time-effective for the people who work a lot but still wants to be healthy and fit.WHAT ARE SCIENTIFIC RESULTS REGARDING HIIT?Let us examine the study Izumi Tabata conducted on a group of Olympic skaters, where he had tested the influence of his “20 seconds work, 10 seconds restâ € training against the influence of regular steady cardio training on their stamina.The test was done by using room bikes.Subjects who were subjected to the Tabata exercise did 8 cycles of his “20 seconds drill, 10 seconds rest” at maximum 170% of VO2, while those who were doing regular cardio exercise did a steady paced cardio, that is often used at maximum 70% of VO2.The results were amazing! People who were doing Tabata’s exercise had their stamina increased more than the people who had been doing regular cardio training.After that point, more studies have been conducted and all of them showed that high-intensity interval training is more efficient when it comes to weight loss and growth of stamina than the regular cardio exercise that has been used as the most efficient way of doing it until then.To some people, this information was very shocking, because it would mean that 4-7 minute exercise gave better results than 30-40 minutes of riding a bike or jogging.It means tha t very busy people could actually use this training to improve their health and stamina because they would need just several minutes instead of around full hour or more for the normal exercise.That way, the people who were claiming they had no time to work out would not be able to do it again, hence, it could actually make them practice a bit more, because, as we have already said, it is very important to do some type of workout every day, in order to keep your body and mind healthy.Yes, the workout is important for the brain as well.Though there are some mindfulness exercises that help you train your brain, it is also important to do your workout regularly, because the brain is linked to all other parts of the body.HIIT VS FATPreviously, we mentioned that HIIT is more efficient in burning fat than some regular cardio training. Now, let us see why that is true.Let’s start with explaining what the main goal of HIIT is.When doing a HIIT, your main goal is to increase your heart rate to reach 85-90% of the maximum heart rate possible.When your heart works within that interval, it means that your body is functioning anaerobically, or in other words, without oxygen.This later leads to excess post-exercise oxygen consumption, or in other words EPOC, which is also known by a different name, simply as the afterburn effect.The afterburn effect represents the number of calories burned after you are done with your exercise.It basically means that your body will need some time to recover itself from doing the exercise, and during that time it will burn more calories, even while you are resting because the exercise itself was very intense and your body needs some time to catch up to it.Now, let us see what happens in your body when you go out for some jogging, for example.Would you get the same results or not?When we are running at some normal speed, our body does not use the anaerobic system.On the contrary, the energy system it uses is aerobic, which is, as you might h ave already guessed, a complete opposite of anaerobic.While working aerobically, our body uses oxygen to power itself and the muscles.And because of that, there is no afterburn effect, leading to the conclusion, which is that your body will not burn additional calories after you have completed the exercise.Well, now we know how exactly both HIIT and regular cardio training work.We no understand for what reasons is the HIIT more efficient than its cardio competitor and why it is considered to be one of the most efficient ways of exercise for burning the fat and losing some weight.HOW LONG SHOULD HIIT LAST?Ha! Considering this question, there are a lot of different opinions.Some claim it should last around an hour, some claim more, some even goes to the lengths to say that it takes just 7 minutes of a workout to do the efficient HII training.Of course, all people are different, so some people can do HIIT a bit longer than others.Therefore you should start small, with the recommended l ength and then adjust it to your needs and possibilities.The general opinion is that if your HIIT exercise took you longer than 30 minutes, it means that you have not pushed yourself enough and that the afterburn effects that should have come out of it would be lesser and not on optimal levels.Apart from that, some claim that if your HIIT exercise takes less than 15 minutes, it means that you did push yourself, but it also means that you overstepped and didn’t reach that optimal afterburn effect that you would have gotten if you had worked a bit more.That’s why it is important to motivate yourself to be more open to doing a workout, even when you are not in the mood.So, if you still want us to give you some specific interval to work out, we could say around 20-30 minutes.Of course, as said above, it really depends on how much of it you can endure and whether you are motivated enough to continue even if you are not working enough.As you have probably noticed in the previous text, when we had mentioned Izumi Tabata and the workout he brought to us, you can do his exercise in around 4 minutes, but in order for it to be effective, you need to do it for several cycles.So, without any further due, try to keep that in mind and take your lifestyle and personal ability into account when you start planning your own HIIT, because it could either be longer or shorter, depending on a variety of different factors.The general guideline to help you is, what we have already said, around 20-30 minutes, depending on your current stamina and physical readiness.People who are more physically prepared are capable of doing longer and more intense HIIT, so if you are not one of those people, do not worry, you can workout at your own pace, by gradually increasing your workout times over time.WHAT ARE POSSIBLE FLAWS OF HIIT?Despite being very useful for increasing your stamina level and reducing your weight, the high-intensity interval training is not for everyone, so you should th ink carefully whether it is for you or not.So strap in and let us see what are the flaws of HIIT.1. HIIT can cause a lot of stressFirst of all, HIIT could cause a lot of stress, because it is very hard to do this type of exercise.It can often get very demanding, both physically and mentally.So, it is very important that you know your limits and finds out if you have what it takes to do this type of exercise.Of course, people will say that some amount of stress is useful to both your body and mind and they would be right to say so.Without any stress, our mind and body would become too dormant and kind of not interested in anything, which could lead to us not carrying about pain, other people and the things that are happening around us all the time, which is of course not good.On the other hand, a lot of stress is also not good for us, because when we are overstressed, it can be seen by other people, and apart from that, it could also cause some damage to our body and mind as well, wh ich is a very bad thing to happen.We live in a modern time, where there are a lot of things happening around us that influence our stress levels.Simple things, like a family fight, traffic jam or a bad day at work all contribute to the stress level and that is why they should all be included when we intend to plan how long would our HIIT exercise take.If you lead a very busy life, it wouldn’t be too good to add another 45 minutes of stress with HIIT, so that’s why you need to take everything into account.On the other hand, if you are well rested, you sleep well or just have something that you use to vent out your stress, then it would be a good idea for you to incorporate HIIT exercise during the week.For example, 3-4 times per week with the HIIT lasting around 20-30 minutes each.That way you will manage your stress level easily and be able to workout enough for you to reach that goal, whether it is to lose some weight or to increase your stamina level.2. HIIT is not useful for bodybuildingAll throughout the text, we have mention how HIIT has the positive effects on stamina level, how it helps if you need to lose some weight and maintain very good muscular activity, but we have never mentioned anything about its influence on bodybuilding.That is the case because there is no influence.HIIT exercise is just not made for increasing your strength and becoming large like Arnold Schwarzenegger.If your goal is just that, then you have to do another type of training, with more weight lifting included.There are a couple of ways of doing this, but the traditional one is to focus on training one muscle family per training.For example, people usually train biceps or triceps, leg muscles or back muscles independently.There are a couple of more new ways of doing it, but it is not the topic of this text, but you can check other articles if you are more interested in that.For now, we will focus on HIIT exercises and how it can help people who are ready to invest themselve s in it.HIIT WORKOUT EXAMPLESThere are a lot of types of HIIT exercises, depending on the time needed and exercises included.You can also combine multiple simple exercises in order to create your own customized training.Therefore we cannot recommend just one type of HIIT.It all depends on your preference and your ability to do certain types of exercises.Some may suit you more, some not, so try to find the best combination for yourself.If you really have no clue which ones would you prefer and you do not have time to experiment, you can check this video, which describes my personal favorite HIIT exercises. We will list some of the most common types of HIIT workout below, so stick with us and let’s find the perfect HIIT workout for you!1. Walk, sprint, walkThis is the simplest HIIT workout you can do. The idea is to walk for 30 seconds, then to sprint for 30 seconds.This way you will speed up your heart rate and reach that afterburn effect we had previously talked about.Of course, y ou should do this in cycles, ranging from 10-15, depending on your current stamina level. The more the merrier, but make sure not to get too tired, because the point of this is not to fall down out of exhaustion, but to gradually increase your stamina.2. Run, sprint, runThe same concept applies here, except that instead of walking you have to run.This exercise is generally much harder, but if you feel ready enough you can start from this one, instead of starting with the first one.However, if you feel like you are not capable of pulling it off, you should either start with the first exercise or reduce the number of cycles to around 5-7 and see if you can make it.3. Push me up to infinity!Yes, you have probably guessed this one right. As the name suggests, this exercise consists of doing infinite pushups.The idea is to do 10 pushups at a time with 15-30 seconds rest between each cycle.Since this exercise has infinity in its name, there is no real limit on how many cycles you can do.B ut, even the most experienced people tend not to do more than 10 cycles.So, if you are a beginner, try with a smaller number, of let’s say, maximum 5 cycles. You can also combine it with other exercises, and create your own cycle, which would contain several different exercises.4. Squatting without stoppingSame as the previous one, this one is infinite, you can do it as many times you want and are physically able to.The idea is the same, do 10 squats per cycle, and repeat it as much as you can, with 15-30 seconds rest between each cycle.This can be very exhausting, so tread carefully and if you feel like you will drop, stop and take a longer rest, or just plan your squat cycles more appropriately so you maximize your efficiency.5. Pushups + SquatsOne of the most common exercises is to combine pushups and squats, and by squats, we mean air squats.Again, the idea is generally the same, do 10 pushups, each followed by an air squat and then repeat for 10 cycles if you can endure it. I f not, just reduce the number of cycles you are doing and you should be good.Also, this one can also be very tiring so be mindful of that and make longer rest intervals or reduce the number of cycles so you would reach the optimal efficiency.6. Infinite BurpeesIf you hated the previous one, you will hate this one even more. It’s a combination of the previous exercise with some additional tweaks.The general idea is the same as before, with the addition that rest intervals could be increased to 30-60 seconds.So, do the same, 10 cycles, with the rest interval of 30-60 seconds.7. Sit and JumpWhat you need to do here is do 10 sit-ups followed by standing up and jumping vertically into the air as much as you can.After each cycle, rest up for 30-60 seconds.You can also combine this exercise with some of the previous ones to make it even harder if you think you are up for it.8. Jumping SealNo, you will not ride a seal! Don’t get your hopes up. This drill has gotten its name because of t he navy seals.Anyway, the idea is to do 50 jumps with your hands in front and then waving horizontally while jumping.This should be done as fast as possible, but you need to make sure to maintain a good rhythm. If you feel like you are going too fast you can slow your pace.The rest interval is between 45-60 seconds. Try to repeat this exercise as much as possible, but let’s say 10 cycles would be more than enough.FINAL WORDThere you go, people! Now you know what HIIT really is, why it is very useful when it comes to losing weight or just improving your stamina level.You know what are its benefits and weaknesses, so you can now start training and choosing the right HIIT workout for you out of the all we have mentioned or just combine some of the exercises and create your own HIIT workout plan if you feel like it.

Friday, May 22, 2020

The Reality Of Reality Television - 1887 Words

Reality television has several sub-genres such as talent contests, reality news, makeover shows, and even some law enforcement programs. However, the genres that portray women in the most negative way followed by an enormous amount of stereotypes are dating shows and documentary or lifestyle series. Reality shows have grew to be one of the most exciting and successful forms of TV program today with many networks that provide different series of jaw-dropping â€Å"reality†. The different styles and format of these shows have favorably positioned them in the network markets, generating high ratings, large profits and fame for the cast members of these shows. Reality TV is difficult to define because of the branches of subject that have evolved over the course of the years. In the early stages of the genre, reality TV was associated with on-scene footages of law and order or emergency services; more recently, reality TV is associated with anything and everything, from people to p ets, from birth to death (Hill, 2005, p. 41). Photography s dominance as the most reliable method of documenting reality for many decades led to the use of cinematography to capture the real as first practiced by the Lumià ¨re brothers (Joniak, 2001). In which that open the doors to filming reality tv and recording ordinary subjects performing real activities. â€Å"Reality shows are everywhere, from cable and broadcast television to the Internet. Reality TV programming has generated millions of viewers,Show MoreRelatedThe Reality Of Reality Television936 Words   |  4 PagesThe reality show phenomenon Have you ever wondered what attracts millions of Americans each week to watch this cultural phenomenon know as reality television? It first started in 1948 when Allen Funt created a TV series called Candid Camera, this is the first known reality television show series. â€Å"Reality television episodes have increased up to 57% of all television shows that can be found on your TV guides† (Shocking). Big Brother was one of the first successful and most viewed reality televisionRead MoreThe Reality Of Reality Television882 Words   |  4 Pages What is it about these reality shows such as: Keeping Up with the Kardashians, Bad Girls Club, and The Real Housewives that we cannot stop watching? After watching reality shows like this, it leaves people craving the next episode of the next week. Reality television producers are exploiting people by giving the public a â€Å"sense† of reality but not the real version of it, but rather exploit people and use stereotypes to make money for entertainment. The specific points of this argumentRead MoreThe Reality of Reality Television1699 Words   |  7 PagesThe Reality of Reality Television Jacqueline Knudsen ENG122: English Composition II Jenna Fussell February 2, 2013 The Reality of Reality Television Have you ever set there watching your favorite reality television show and wondered what effects it could have on you, your family or your friends? Truth is most people do not think about the effects television shows can have before watching them or allowing their children to watch them. ThisRead MoreThe Reality Of Reality Television1499 Words   |  6 PagesAgainst Reality TV For close to a decade, the ethics behind the existence of reality TV have been questioned. While there are ardent viewers of reality TV, researchers and other scholars disapprove them, and claim that the world would have been in a better place. Reality TV shows, especially in America, are extremely profitable to media owners, and this has increased their popularity in the recent years. The main target audience for these shows are teenagers and women, who spend a lot of time discussingRead MoreThe Reality Of Reality Television927 Words   |  4 PagesBehind the Reality of Reality TV There are many different opinions when the subject of reality television is discussed. Although reality television shows are thought to be negative they really are just mindless entertainment. Many can argue that these shows are misleading and disturbing. On the other side of this, people merely use these shows for entertainment and allow people to forget about stress in their lives. The cause of these different opinions is a result of different age, gender, religionRead MoreThe Reality Of Reality Television1511 Words   |  7 PagesReality TV is defined as television programs in which real people are continuously filmed, designed to be entertaining rather than informative.(Dictionary) As we all know, in today s world we are presented with numerous Reality TV Show such as Keeping up With the Kardashians, Basket wives and The Real Housewives of Miami. These shows give a false message to their viewers of what is reality and what is purely entertainment. Many reality programs create an artificial environment for the show thatRead MoreThe Reality Of Reality Television991 Words   |  4 PagesWe see content on television every day either to see the news, watch a movie, series or any program we would like to watch. Television give us a different and visually perfect way of entertainment. Reality television is a genre of television which seems to be unscripted showing actions of â€Å"real life†. The viewer sees the reality shows for entertainment but neither the pressure, competitiveness nor loneliness that lives in imagines. To be real -time and people- admiration from viewers, thinking thatRead MoreThe Reality Of Reality Television Essay1287 Words   |  6 PagesReality television is now one of the most consumed television genres broadcasted to the general public. Reality television has become more about mindless watching and creating the most unrealistic environment possible, rather than creating a show for an important purpose. Today, shows like Beauty and the Geek, Big Brother, and every other reality show fit into this mold, but when viewed critically lessons appear. In the case of TV today, reality shows depict an altered reality because of the unrealisticRead MoreThe Reality Of Reality Television Essay1973 Words   |  8 PagesIntroduction Reality television has turned into a noteworthy piece of our way of life. The shows are described to be fun, engaging and acquaint society with new points of view. In the wake of a monotonous day at work, it s decent to return home and watch something careless on television, while unwinding. While the debate that violence in the media is making for a brutal culture has been made a million times, sometime recently, I am striving to make an alternate relationship. As we are aware, theRead MoreReality Television : Is It Reality?849 Words   |  4 PagesIs it Reality? Pop culture is popular culture that dominates a society at a point in time. Today, reality television is a part of the society’s popular culture (Johnson 289). The question is why? Reality television is a genre of television programming that focuses on members of the public living in conditions made by the creator, and displays how people are intended to behave in everyday life (Johnson 290). Reality television is debasing and should be strictly controlled, if not banned altogether

Thursday, May 7, 2020

Computer Networks And The Modern World Essay - 983 Words

Computer network technology The subject I will be undergoing in my next year will be Computer Network Technology BSc Hons. This subject looks at all aspects of computer networking in the modern world. This course also gives many computing principles such as systems analysis and database development. I have chosen this course because I have always been interested in computing and have made a few database systems while working in the army. I would like to learn more about network security and I hope to work in Germany for two years before moving to America pursuing a career in network security. I have a keen interest in networking and have done penetration testing for my old high school. After being made redundant from the army I hope to improve my knowledge of computing and better my qualifications as leaving college at nineteen to pursue a career in the military has made me realise that I should of worked harder at college and gone to university. Knowledge This subject deals with all aspects of computing but focuses mainly on computer networking. It will give the knowledge to be able to explain, evaluate and apply techniques and methods to solve a range of computing problems. Explain and apply project management tools and techniques. Identify, evaluate and justify appropriate hardware, systems software and communications protocols required for network design and implementation. Competently identify, assess and use tools and techniques for the management of networks. SolveShow MoreRelatedSocial Networking, E Commerce, Information Systems, It Risk Management Essay1215 Words   |  5 Pagesinformation systems, IT risk management and how they have influenced the modern day business organizations in terms of Promoting their business through social networks, how important to have a risk management plan in an organization, and how Ecommerce has become essential part of the business, also The value of information system is for the people of t he modern world. Introduction Social Networks:- What are social networks? Social networking is a plat form, online service or a website which focusesRead MoreBenefits Of Using The Internet1298 Words   |  6 PagesIntroduction: In modern society we heavily rely on computers for a number of different reasons whether that be paying bills, shopping online or simply staying in touch with family and friends. If you take a look around at daily life it is clear to see just how important computers and technology are to us, they make life easier. One would never have that one day you could do your shopping without having to leave the comfort of your own home, this is just one of the basic uses of the modern computer. The fastestRead MoreInformation Technology And Its Impact On Travel, Education, Healthcare, Social, And Entertainment1052 Words   |  5 PagesAbstract Information technology has helped shaping the world. Both in business and society, information technology has an impact on travel, education, healthcare, social and personal communication and entertainment. (Ramey, 2012) In this short paper, I intend to highlight the role of information technology along with the significance of each of its components and how they are interconnected in the overall system. Information technology is built with five core components. 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Wednesday, May 6, 2020

Why is Aluminium utilised in the contemporary world Free Essays

Aluminium is used extravagantly in the contemporary world, primarily due to its unique structure and desirable properties. Further, aluminium is the most abundant metal in the earth’s crust; thus, scarcity is not a problem. It is a member of the Boron group of chemical elements, and is ‘the most widely used non-ferrous metal’ (Planet Ark, 2010). We will write a custom essay sample on Why is Aluminium utilised in the contemporary world? or any similar topic only for you Order Now It has the symbol Al, and its atomic number is 13. It is necessary to consider the fact that ‘pure aluminium is not often used as it has poor mechanical properties. It is usually alloyed with other metals or silicon’ (Chemical Industry Education Centre, 2011). A key area in which aluminium alloys are utilised is for the construction of aircraft and rockets. Aircraft manufacturers use high-strength aluminium alloys for the construction of aircraft and rockets. This is because aluminium (the predominant element of the alloy) is able to be compounded with other metals and substances, is highly malleable, resistant to corrosion and consists of a high strength to density ratio, in comparison to other metals. ‘Aluminium is used in virtually all segments of the aircraft, missile and spacecraft industry-in airframes, engines, accessories, and tankage for liquid fuel and oxidizers’ (Davis, 2000).Further, Aluminium 7075 is an aluminium alloy that is used heavily in the construction of aircraft and rockets (The Aluminum Association, 2008). Aluminium consists of a low ionisation energy, as well as a relatively high atomic radius, in comparison to other metals. The ground state valence electron configuration of Aluminium is 3s2 3p1 (Web Elements Ltd, 2011). Consequently, Aluminium comprises of three valence electrons, which are able to be shared with other elements, or in this instance, metal atoms. In addition, as aluminium has a low ionization number, 6.0 Electron Volts (Ev), as well as moderately low ionisation energies, this implies that the valence electrons of aluminium atoms are not strongly held by the nucleus, and are thus, delocalized. Delocalized electrons are not restricted to one atom or another; they are distributed across several atoms in the solid. Thus, valence electrons can move freely out of the influence of their kernels (atomic orbit/structure minus valence electrons). Consequently, aluminium, and other metals, has free mobile electrons (Tutor Vista, 2010). In addition, the bonding in metals is often described through the â€Å"electron sea model†. Another reason as to why Aluminium is able to be compounded with other elements pertains to its electronegativity. Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons (Clark, 2009). The Pauling Scale is used to measure the electronegativity of a particular element. Metal’s reactivity is dependent on their electropositivity; thus, a metal with a higher value in the Pauling Scale is less reactive than another metal with a lower value in the Pauling Scale (Tutor Vista, 2010). The electronegativity of aluminium is 1.61 Pauling units (Pu) (refer to table 3), whereas the electronegativity of copper is 1.65 Pu and iron, 1.83 Pu (refer to table 3). Thus, aluminium is more reactive than copper and steel, and is able to be adeptly bonded with other elements. (Other factors are involved) Malleability is the ability of a metal to exhibit large deformation or plastic response when being subjected to compressive force (Engineers Edge, 2012). The key reason as to why Aluminium is highly malleable pertains to its polycrystalline structure. The polycrystalline structure of aluminium consists of various dislocations, or crystallographic defects. The presence and movement of these dislocations, gives rise to characteristic and desirable metallic properties, for instance, malleability (Davyson). Aluminium is highly resistant to corrosion. This is primarily because a thin visible oxide forms instantly, when the metal is exposed to the atmosphere. These substances are formed as aluminium has the electron configuration 1s22s22p63s23p1, and oxygen has the electron configuration 1s22s22p4; this means that aluminium loses 1-3 valance electrons to oxygen, yielding aluminium cations with a 3+ charge, as well as oxygen atoms with a 2- charge. This is an example of an ionic bond. In addition, when Aluminium oxide is formed, it consists of a noble gas configuration, and; therefore, is balanced as well as stable. The formation of Aluminium oxide can be represented by the following formula: 4Al(s) + 3O2(g) → 2Al2O3(s) Further, this oxide layer is one of the main reasons for aluminium’s good corrosion properties; it is self-repairing if damaged, and is stable in the general ph range 4-9 (SAPA Profiles UK Ltd, 2010). When aluminium is used for the construction of aircraft and rockets, it is often anodized to improve strength, and colour (Davis, 2000). Aluminium 7075 possesses an incredibly high strength to density ratio. The maximum/ultimate tensile strength of the alloy varies from 40000 psi to 78000 psi, depending on the grade of the temper (Alcoa, 2011). It is strong, with strength comparable to many steels (iron). The tensile strength of iron (Fe) is approximately 40,000 psi (All Metals Forge Group, 2011). Aluminium 7075 has a density of 2.8g/cm ³; where as the density of steel is 7.87 g/cm ³, approximately 282.07% greater. The low atomic mass, 26.982 AMU, and high atomic radius of aluminium, 182pm, relate to the principal reason as to why it has a low density, in comparison to iron. Iron, on the other hand, has an atomic mass of 58.845 AMU and an atomic radius of 172pm. Aluminium consists of a face-centred cubic (fcc) crystal structure, whereas iron has a body-centred cubic structure. The atomic packing factor (APF) of a face-centred cubic crystal structure is 0.74, whilst the APF of a body-centred cubic crystal structure is 0.68. Although aluminium comprises of a more compact atomic structure, the fact that Aluminium has a higher atomic radius, as well as lower atomic mass, in comparison to that of iron; thus, having less mass in a certain space than iron, allows it to have a lower density. This pertains to the fact that density is equal to mass over volume (d=m/v). Aluminium is used extravagantly in the contemporary world, primarily due to its unique structure and desirable properties. A Key area in which aluminium is utilised is for the construction of aircraft and rockets. The reasons, as to why aluminium is used in this particular application, are apparent and abundant. Bibliography Alcoa. (2011). Alloy 7075. Retrieved 2012 à Ã‚ ¹Ãƒ Ã‚ ¸Ãƒ Ã‚ » 11-February from Alcoa: http://www.alcoa.com/mill_products/catalog/pdf/alloy7075techsheet.pdf All Metals Forge Group. (2011). Metal Tidbits, Tensile Strength. Retrieved 2012 à Ã‚ ¹Ãƒ Ã‚ ¸Ãƒ Ã‚ » 11-February from All Metals Forge Group Web site: http://www.steelforge.com/metaltidbits/tensilestrength.htm Chemical Industry Education Centre. (2011). Aluminium: Uses. Retrieved 2012 à Ã‚ ¹Ãƒ Ã‚ ¸Ãƒ Ã‚ » 11-February from Greener Industry: http://www.greener-industry.org.uk/pages/aluminium/aluminium_2uses.htm Clark, J. (2009). Electronegativity. Retrieved 2012 à Ã‚ ¹Ãƒ Ã‚ ¸Ãƒ Ã‚ » 14-February from Chemguide Web site: http://www.chemguide.co.uk/atoms/bonding/electroneg.html Davis, J. (2000). Corrosion of Aluminum and Aluminum Alloys. New York: ASM International. Davyson, S. (n.d.). The Structure of Aluminium. Retrieved 2012 à Ã‚ ¹Ãƒ Ã‚ ¸Ãƒ Ã‚ » 11-February from Aluminium: http://sam.davyson.com/as/physics/aluminium/siteus/structure.html Engineers Edge. (2012). Malleability – Strength (Mechanics) of Materials. Retrieved 2012 à Ã‚ ¹Ãƒ Ã‚ ¸Ãƒ Ã‚ » 4-February from Engineers Edge Web site: http://www.engineersedge.com/material_science/malleability.htm Planet Ark. (2010 à Ã‚ ¹Ãƒ Ã‚ ¸Ãƒ Ã‚ » 10-December). Aluminium. Retrieved 2012 à Ã‚ ¹Ãƒ Ã‚ ¸Ãƒ Ã‚ » 11-February from Planet Ark: http://cans.planetark.org/recycling-info/facts.cfm SAPA Profiles UK Ltd. (2010). Aluminium’s Corrosion Resistance. Retrieved 2012 à Ã‚ ¹Ãƒ Ã‚ ¸Ãƒ Ã‚ » 14-February from Aluminium Design: http://www.aluminiumdesign.net/corrosion-resistance.html Swarthmore College Computer Society. (2012). Ductility. Retrieved 2012 à Ã‚ ¹Ãƒ Ã‚ ¸Ãƒ Ã‚ » 11-February from Swarthmore College Computer Society Web site: http://www.sccs.swarthmore.edu/users/08/ajb/tmve/wiki100k/docs/Ductility.html The Aluminum Association. (2008). Aluminum in Aircraft. Retrieved 2012 à Ã‚ ¹Ãƒ Ã‚ ¸Ãƒ Ã‚ » 11-February from The Aluminum Association website: http://www.aluminum.org/CONTENT/NAVIGATIONMENU/THEINDUSTRY/TRANSPORTATIONMARKET/AIRCRAFT/DEFAULT.HTM Tutor Vista. (2010). Bonding in Metallic solids. Retrieved 2012 à Ã‚ ¹Ãƒ Ã‚ ¸Ãƒ Ã‚ » 11-February from Tutor Vista Web site: http://chemistry.tutorvista.com/physical-chemistry/metallic-bonding.html Web Elements Ltd. (2011). Properties of Aluminium Atoms. Retrieved 2012 à Ã‚ ¹Ãƒ Ã‚ ¸Ãƒ Ã‚ » 12-February from Web Elements: the Periodic Table on the Web: http://www.webelements.com/aluminium/atoms.html How to cite Why is Aluminium utilised in the contemporary world?, Papers

Monday, April 27, 2020

The Moral Flaws of Al Gores An Inconvenient Truth free essay sample

This is the age of the cliffhanger. It is the age of the plot twist. It is the age that has taught people to make sense of the world not merely with that time-honored aid—the story—but also with stories that self-consciously mimic the serial workings of television.An Inconvenient Truth spends too little time on what audiences might do about global warming, too much time trying to impress us with the Ask Mr. Science side of Gores personality. Fewer details might have made the movie more effective, especially given that some details are off. For instance, Gore spends a while saying Earths atmosphere is relatively thin, then somberly declares, The problem we now face is that this thin layer of atmosphere is being thickened by huge quantities of carbon dioxide. Thickness is not the issue. Carbon dioxide, the greenhouse gas produced by fossil-fuel combustion and forest fires, has molecular bonds that vibrate on the same wavelengths at which infrared energy radiates upward from Earths surface; the vibration warms the CO2, trapping heat. We will write a custom essay sample on The Moral Flaws of Al Gores An Inconvenient Truth or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page The main atmospheric gas, nitrogen, does not absorb energy on those wavelengths. It is the chemistry of carbon dioxide, not its density, that matters. (See this chemistry page maintained by the carbon dioxide study center at Oak Ridge National Laboratory.) Anyway, you dont really need to know how greenhouse gases function. Why does Gore insist on giving a wrong explanation?The movie takes a wacky side-trip into a conspiracy theory about Philip Cooney, who was a lobbyist for the American Petroleum Institute and then became chief of staff of George W. Bushs Council on Environmental Quality—and then got a plush office at ExxonMobil. Gore asserts Cooney was in charge of environmental policy in the White House, which is nonsense. The EPA administrators, Josh Bolten, Andrew Card, James Connaughton, Mitch Daniels, John Graham, Al Hubbard, and Karl Rove, have been Bushs go-to figures for environment policy; and Connaughton, to whom Cooney reported, is green as can be. Gore implies Cooneys secret mission was to sabotage such efforts as the federal Climate Change Science Program. If so, Cooney better keep his day job, since that program recently declared clear evidence of human influences on the climate system.