Toxic PCs Essay Example for Free

Toxic PCs Essay Computer hardware can contain a variety of toxic and hazardous materials. Today I’m going to talk about these kinds of materials and why they are toxic to our environment. I’m going to discuss the locations of disposed electronics and how it is done. When consumers donate old televisions and monitors to recyclers those companies should dispose of them in a manner that doesn’t harm the environment. Stockpiling monitors is hazardous to the environment. This is because the glass could easily break and the lead which is a neurotoxin material enters the soil and ground water. One of the major environmental impacts of dumping computers into landfills is due to the fact that the solder used in the components of the circuit boards is comprised of a tin-lead alloy and over time the lead can leach from the solder. Usually the lead, which is a toxic substance, finds its way into the drinking water (Warren, Scott) There are different type of companies that recycle electronics in different communities and some of them are nonprofit companies you just donate your computer to them for example there is this company in Michigan it is called Responsible Electronics Recycling they recycle computer the right way breaking computers into small particles and removing all the toxic material from getting into our environment. The role of disposing electronic has a great advantage because when monitors get recycled the right way they can be reused again for goods. The Responsible Electronic Recycling Company says: Our mission is to inspire our community to live and work in a sustainable manner. This mission is accomplished by providing environmentally responsible electronics recycling and green job training for at-risk youth and challenged adults. 100% of proceeds generated go toward community service programs that focus on education and environmental initiatives (Responsible Electronic Recycling). And this is how recycling is done to these electronics. I think the technology will have an influence on our health and our environment because of all the toxic material that is used in the advanced electronics and if our air is polluted then it is going to have an effect on our health. The health effects of toxic substances and hazardous wastes are not yet fully understood. Research to better understand how these exposures may impact health is ongoing. Meanwhile, efforts to reduce exposures continue. Reducing exposure to toxic substances and hazardous wastes is fundamental to environmental health  (Geneva, Switzerland). I think if we take care of our environment meaning by not polluting the air and soil we will be able to reduce the risk of having any health problems but if we do not do so this polluted environment will lead us to have issues regarding our economy later on in the future. Therefore we need to work on educating each other and take action. Finally after looking at all the information above I think now we see why we need to think carefully when we are getting rid of an old computer or any electronic. We need to make sure that if our computer been donated to a manufacture for disposal it is going to be disposed properly and everyone should take this into consideration and practice the right way to recycle electronics. Reference Dunn, C. (2006, April). How to: Recycle Your Computer. In treehugger. Retrieved October 20, 2012, from http://www.treehugger.com/culture/how-to-recycle-your-computer.html Goneva, S. (2006, May 2). Preventing disease through healthy environment. In World Health Organization. Retrieved October 20, 2012, from http://www.healthypeople.gov/2020/topicsobjectives2020/overview.aspx?topicid=12 Warren, Scott. The Environmental Impact of Computer Disposal. Scott Warrens Blog. N.p., 22 May 2008. Web. 18 Oct. 2012. http://www.scottwarren.info/2008/05/22/the-environmental-impacts-of-computer-disposal/.

Diversity Among People Essay -- Diverse Culture Cultural Essays

Diversity Among People "Each person's map of the world is as unique as the person's thumbprint. There are no two people alike. No two people who understand the same sentence the same way . . . So in dealing with people, you try not to fit them to your concept of what they should be." (Milton Erickson) We are all distinguished and united by differences and similarities according to our gender, culture, language, age, race, our sexual identity, and in many cases income level. There are these diversity qualities that challenge our intellect and emotions as we learn to work and live together in harmony. Diversity is not just about gender, skin color, ethnic background, religion, speaking different languages, or belonging to a different culture, it's also about thinking and expressing things differently. One thing that plays a very important role is "Language", what we as people use to communicate with. A language can bring one nation together and separate it the same time. In today's society, unfortunately if you don't speak the language that majority of people speak you're often put down and even ignored. And in the same society being 'different" it is not easy. What I mean by different is having a different background, speaking "a broken English"( Tan), being part of a different cul ture. Even though most of us know that this nation is formed on diversity, people still haven't learned to tolerate one another's differences and somehow learn from them however, everyday that goes by more people are realizing even more that these differences make us who we are. They shape the way we think and express yourself and our opinion about others. As humans, we have a unique ability for language which gives expression to our many-s... ...ity groups within the United States. Should serve as a comparative study of the diverse cultural contributions, experiences, or world views of two or more ethnic or racial minority groups in the U.S. The course should focus on the study of the social, economic, political, or psychological dimensions of relations between and among racial, ethnic, and gender groups in the U.S. All these criteria's would help people learn how to deal with diversity and become more knowledgeable about it. There's many people in this world of ours and they are all different, they are part of a different religion, gender, background, and with different sex identity and what brings us all together is the understanding that we are all unique and by giving each other a chance to express our ideas and opinions we grow as individuals and learn to appreciate others for who they are. home

Heat of Formation of Magnesium Oxide

ObjetiveTo determine the heat formation of MgO (Magnesium Oxide) using Hess’s Law, which states the heat within a chemical reaction is independent of the pathway between the initial and final states.IntroductionChemical reactions require heat energy to complete, called an endothermic reaction, or produce heat energy, and thus called an exothermic reaction. The heat energy produced by such reactions can be measured using a calorimeter, a piece of equipment that can isolate the reaction in an insulated container. Using the calorimeter one can then determine the rise and fall in temperature of the reaction. When this temperature change is multiplied by the heat capacity, the amount of heat needed to raise the temperature of a body by one degree, we can measure the change in converting our initial components (reactants) to their respective products.In this experiment we will measure the amount of heat released from 3 reactions (ΔHA ΔHB ΔHC) and calculate the sum of all 3 reactions to determine ΔHT, which will give us the heat formation of MgO. If Hess’s law holds true and barring minimal experimental error, the pathway we use to determine ΔHT should have no bearing on our calculation matching the accepted calculation of MgO.MethodsAs per lab manual we used a calibrated calorimeter (using a rounded end thermometer so as to not puncture a hole in the calorimeter) to determine the heats of reaction for Magnesium (Mg) with Hydrochloric Acid (HCl) and Hydrochloric Acid with Magnesium Oxide (MgO). Then using mathematical formulas we were able to calculate the heat formation of MgO, which is measured in kJ/Mol. Since both reactions are in dilute water solutions of  HCl it was necessary to know the heat capacity of water, but because some heat would be transferred to the calorimeter whose heat capacity was unknown, we had to record a correction factor (x) based upon the specific heat of water using the equation [m(h2o)+X]Cwater+Δwate r=-1(m(ice water)CwaterΔtice water).We then recorded the mass (m) of room temperature water and ice water each in a respective cup and then poured the ice water into the room temperature water and recorded the temperature change. By knowing (x) we could then calculate the heat of reaction for Mg with HCl (ΔHA kJ/mol) and for HCl with MgO (ΔHB kJ/mol) using the equation q=m(HCl+X)C ΔT where m is the mass of the reactant used with Mg + X, C is the heat capacity of water (4.184 J/g °C), and ΔT is the total temperature change in each reaction. Using the results of these calculations and Hess’s law we can then determine the heat formation for MgO.DataAll mass readings are given in units of grams (g), and all temperature readings are given in degrees Celsius ( °C).Part AMass of the Calorimeter + RoomTemp Water (g)48.08Mass of room temp water (g)46.29Mass of Cal + room temp water + icewater (g)115.40Mass of ice water (g)67.32Temp of room temp water ( °C)42. 4Temp of the ice water ( °C)0.1Final temp. of room temp water ( °C)17.3Change in temp of ice water ( °C)17.2Change of temp of room temp water ( °C)-25.1Mass of the calorimeter (g)1.79Part 2AMass of Calorimeter (g)1.79Mass of Cal + HCl (g)103.55Mass of HCL (g)101.76Mass of Mg (g)0.5Temperature of HCl ( °C)20.3Final temperature of HCl + Mg ( °C)42.0Change in Temperature ( °C)21.7Part BMass of Calorimeter (g)1.79Mass of Cal + HCl (g)101.76Mass of HCl (g)99.88Mass of MgO (g)0.8Temperature of HCl ( °C)20.3Final temperature of HCl + MgO ( °C)25.8Change in Temperature ( °C)5.50Results and DiscussionTo calculate X using the equation [m(h2o)+X]Cwater+Δwater=-1(m(ice water)CwaterΔtice water) the variable X must be isolated and doing so we were than able to calculate the correction factor:Based on the calculations of the calorimeter correction factor, X was determined to be 0.158 g. Then using the equation q=m(HCl+X)C *ΔT, where q is equal to the amount of energ y given off, and than calculating the value in -kJ/Mol (because these are exothermic reactions) we were able to determine ΔHA and ΔHB.qA=m(HCl+X)C xΔTqA=(101.76 g + 0.158 g) x 4.184 J/g °C x 21.7 °CqA= 9250 J = 9.250 kJ 9.253602176qB= m(HCl+X)C xΔTqB=(101.76 g + 0.158 g) x 4.184 J/g °C x 5.50 °CqB=2350 J = 2.350 kJTo then calculate the heat formation of MgO ΔHT, the sum of all the reactions must be determined including ΔHC, the heat formation of water, which is already predetermined to be -285.8 kJ/mol. However to determine the proper equation for ΔHT, the stoichiometric equations must first be balanced:Therefore the heat formation of MgO was determined to be -618.35 kJ/mol. According to the textbook, the accepted value for ΔHT=-601.8 kJ/mol. To determine the accuracy of the calculation we can determine the % error:As far as accuracy goes a percent error of 2.75% is very acceptable. Because the methods of the experiment were conducted using a crude calorimeter I would have expected the percent error to be higher, assuming that because of it’s construction it would not have very high efficiency.I would expect that any error that might have occurred happened during the transference from one cup to another. Because the substances were transferred so quickly and taking into account the number of seconds that it took to replace the thermometer to begin recording data again it is possible that energy was either lost in the transfer or energy was lost before the recording was actually able to begin.ConclusionIn this lab we were able to determine the heat of formation of MgO using a simply constructed calorimeter, which was found to be -618.35 kJ/mol.

My Favourite Writer

My Favorite Writer Robert Lynn Asprin, living in New Orleans, was born in 1946. He grew up in campus Ann-Arbor, in environment of book shops, museums and libraries. Since childhood he has got used to appreciate a variety in everything, study at Michigan University and services in army during the Vietnamese war have only strengthened this habit. Definitively Asprin’s outlook as a writer was generated 12 years which he has worked in accounts department of small firm – one of the American branches of corporation â€Å"Copier†. Interests and hobbies of the author are extremely various – from fencing and music to fishing and sewing.By own recognition of the writer whom he only was not – the teacher of fencing, the Mongolian commander, the bookkeeper etc. Asprin begins from science fiction novels – more precisely, from science fiction action, sound, but quite traditional, like â€Å"Cold War of Money† (1977), his popularity was brought to hi m by cycle of novels â€Å"World of thieves†; he is till now the editor-in-chief of this cycle together with his wife Lynn Ebby. Since â€Å"the World of thieves† Asprin becomes that Asprin which is read by millions, – the magnificent master of a comic science fiction and fantasy.After â€Å"The World of thieves† have followed â€Å"Ful’s Company† and well-known â€Å"Mythical Cycle†. In my opinion â€Å"Mythical Cycle† is so good that you can read it in one breath. However if in â€Å"Myth† except humor would be nothing, he wouldn’t receive that popularity what deservedly uses. Asprin’s books are distinguished by that, that you can see our daily life. Asprin’s heroes are real as we and relations between them are not less real, that certainly is a sign of the big literature. They love each other, scoff one at another, support and reject as well as we.

Author Citation in Botany and Zoology (aka Species Citation)

Author Citation in Botany and Zoology (aka Species Citation) Author Citation in Botany and Zoology (aka Species Citation) Referencing is tricky at the best of times. But it can be especially confusing in subjects such as botany and zoology, where you may have to cite plant and animal species’ names. This is known as author citation, or sometimes â€Å"species citation,† and it works like this†¦ What Is Author Citation? Author citation is used when discussing the taxonomy of different plants and animals. So if you name a species in your writing, you may need to cite its scientific name (i.e. Latin name) and the person who named it. This ensures clarity when two species or subspecies have a similar name. However, the format to use will depend on whether you’re citing a plant or an animal. Author Citation in Botany The full rules for author citations in botany are set out in the International Code of Nomenclature for algae, fungi, and plants. The basic format, however, includes the scientific name of the species and an abbreviated name of the person who named it. If a subspecies has a separate discoverer, moreover, the original discoverer should be identified in brackets. For example, we could cite bulb-bearing water hemlock as follows: Cicuta bulbifera (L.) Spreng. is known for its toxicity. Here, we have three distinct elements for the citation: The scientific name of the species (Cicuta bulbifera) The original discoverer (â€Å"L.,† which stands for â€Å"Linnaeus†) And the discoverer of the subspecies (â€Å"Spreng.†) The â€Å"Spreng.† here is short for â€Å"Kurt Polycarp Joachim Sprengel,† who named the subspecies. Many plants will simply require you to cite â€Å"L.,† but you can find abbreviations of other names via the International Plant Index. Author Citation in Zoology The full rules for citing animal species are contained in the International Code of Zoological Nomenclature. The basic citation format uses the scientific name of the species, the surname of its discoverer, and the year it was discovered. For instance: Few would describe Psychrolutes marcidus (McCulloch, 1926) as beautiful. I consider myself an exception. Here, we’ve cited the undeniably gorgeous blobfish using the following: Its scientific name (Psychrolutes marcidus) The surname of its discoverer (i.e., Allan Riverstone McCulloch) The year that the scientific name was first published This allows us to clarify the species in question and credit its discoverer. Youd look this annoyed if someone had caught you in a fishing net, too. Summary: Author Citation in Botany and Zoology Author citation allows scientists and taxonomists to cite the scientific names and discoverers of different plant and animal species. The exact rules depend on the subject area: In botany, cite the scientific name of the species and an abbreviated name of the person who named it (e.g., â€Å"Cicuta bulbifera (L.) Spreng.†). In zoology, cite the scientific name of the species, the surname of its discoverer, and the year it was discovered (e.g., â€Å"Psychrolutes marcidus, McCulloch, 1926†). And if you’d like help checking the references in your work, just let us know.

Using the Spanish Verb Poder

Using the Spanish Verb Poder As one of the most common verbs in Spanish, poder means to be able; in its conjugated forms it is frequently translated as can or could. But partly because the English could can refer to the past, present or future, and partly because the preterite and conditional tenses of poder are often interchangeable, the use of poder isnt always straightforward. Like its English counterparts can and could, poder functions as an auxiliary verb, although in Spanish it is followed by an infinitive. With a few exceptions, most of which dont have counterparts in English, it cant stand alone. Keep in mind that poder is irregular. The -o- in the stem changes to -u- or -ue- when stressed, and the ending is shortened in the future and conditional tenses. Here are the various ways poder is used: In the Present Tense To Mean ‘Can’ or ‘May’ The present-tense forms of poder indicate the ability, either physical ability or having permission, to do something. It is distinguished from saber, which means to know how. Thus, while one may ask,  ¿Puedes tocar el piano hoy? (Can you play the piano today?), one normally would ask,  ¿Sabes tocar el piano? (Can you play the piano? or Do you know how to play the piano?). Puedo hacer lo que quiero. (I can do what I want.)No puede trabajar los domingos. (She cant work on Sundays.)No puedo ir al cine. (I cant go to the movies.) In the Future Tense To Mean ‘Will Be Able’​​ This is similar in usage to the present tense. Podrà © hacer lo que quiero. (Ill be able to do what I want.) No podr trabajar los domingos. (She wont be able to work on Sundays.) No podrà © ir al cine. (I wont be able to go to the movies.) In the Preterite or Imperfect To Mean ‘Could’ or ‘Was Able’ Which tense you use depends on whether the reference is to a one-time event (preterite) or something occurring over a period of time (imperfect). In the preterite, poder can have the sense of to manage to. Pudo salir. (He managed to leave.)No podà ­a salir. (He was unable to leave.)No pudo trabajar porque dormà ­a. (She couldnt work (that particular time) because she was sleeping.)No podà ­a trabajar porque dormà ­a con frecuencia. (She couldnt work because she was often sleeping.) To Make Polite Requests​​ As in English, such requests are made in the form of a question. Usually the conditional form of poder is used, but (while it may seem illogical) the imperfect also can be used.  ¿Podrà ­as darme un lpiz? (Could you give me a pencil?)  ¿Podà ­as darme un lpiz? (Could you give me a pencil?)  ¿Podrà ­a lavarme usted los platos? (Could you wash the dishes for me?)  ¿Podà ­a lavarme usted los platos? (Could you wash the dishes for me?) To Express Possibility or Suggestions​​ Either could, may, or might can be used to translate poder when it is used to indicate a possibility or offer a suggestion. In such cases, either the conditional form of poder or (again, seemingly illogically) the imperfect can be used. The imperfect form may be understood as more colloquial. Podrà ­amos ir al cine. (We could go to the movies.)Podà ­amos ir al cine. (We could go to the movies.)Podà ­a no haber salido. (He might not have left.)Podrà ­a no haber salido. (He might not have left.) To Express What Could Have Happened but Didn’t​​ The preterite is usually used in such cases, although the conditional can be used when directly criticizing somebody. Pudo salir a las tres. (She could have left at 3 oclock.)Pienso en lo que pudo ser. (Im thinking about what might have been.)Me lo podà ­as haber dicho. (You could have told me.) Poder  as a Noun The noun  poder  means power or authority. The adjective form is  poderoso, powerful. Related terms include  potente  (potent or powerful),  potencia  (power, potency, strength) and  potencial  (potential). Poder  Standing Alone as a Verb These are the main exceptions to the rule that  poder  must be followed by an infinitive: When the infinitive is implied by the context.  No  puedo.  (I cant.)  ¿Quià ©n  puede  ms? (Who can do more?)In the impersonal expression  puede  que, usually followed by a verb in the subjunctive, meaning perhaps or it is possible.  Puede  que  salga.  (Perhaps he will leave.)In the expression  poder  con, translated in various ways such as to manage or to cope.  No  puedo  con  ella. (I cant handle her.)  No  puedo  con  el  enojo.  (I cant deal with the anger.)In various expressions where it means roughly could do. La curiosidad pudo ms que el miedo (roughly, his curiosity overcame his fear).  No  pude  menos  que  dar gracias.  (I couldnt do anything less than giving thanks.)In the idiom  a ms no  poder, which means as much as possible or to the utmost. Jugaba a ms no poder.  (He played as hard as he could.)  Es  feo  a ms no  poder.  (Its as ugly as could be.)In the expression  Ã‚ ¿Se  puede?, mean ing Can I come in? Key Takeaways Although poder can be used alone, it most often is used an auxilary verb to mean can or be able to.As an auxiliary verb, poder is followed by an infinitive.The infinitive form, poder, can be used as a noun to refer to power or authority.

Summary and thesis development Essay Example | Topics and Well Written Essays - 750 words

Summary and thesis development - Essay Example As a result, people who frequently watch television shows tend to develop unbalance and unrealistic view of things in the real world. Presenting the ideas of Gerbner, Waters specifically criticises the depiction of characters as well as various ideas in terms of gender, race, sex, health, age, crime and work among other groupings. For example, Waters believes that crime is presented on television in a manner that it appears on the screen over ten times as it is in reality. He argues that presentation of crime on television has high propensity to promote aggression among the viewers. Crime featured in television shows inculcate certain lessons in social sphere by depicting what one person can do to another and go unpunished. While all the representation of characters on television shows are crucial for various reasons, Water’s critique, especially, of the way crime and race are depicted on prime television is very significant and relevant. The big questions are: does Waters’ criticism of crime and race presentation relevant to the modern society? Does it have a bearing on deviant behaviours witnessed in everyday life? Owing to the fact that the modern society is characterised by high crime rates and racially motivated actions, one can agree less that television shows can have a profound influence on the decisions that people make when confronted with certain issues in real life. The show Friday Night Lights is an epitome of a television show that can greatly influence the choices of its lovers. In particular, the episode of season two of the popular television drama features a gruesome murder of a man by a character who is a member of the show’s high school crew. The murderer pulls the trigger in response to an attempted rape on the girl he likes. Afterwards, he conspires with the girl to conceal the body of the victim so as to keep the crime under cover. Landry