Friday, September 4, 2020

Write Amirs diary for the day he witnesses Hassans rape, explaining his feelings and why he did not intervene Essay Example

Compose Amirs journal for the day he witnesses Hassans assault, clarifying his emotions and why he didn't mediate Essay There are two things I cannot quit contemplating: the renunciation in Hassans face, and his earthy colored corduroy pants which were lay against the heap of disintegrated blocks. I nearly said something. Nearly. Yet, I will never be the mard my dad anticipates that me should be. Never be a genuine man. In any case, does it make a difference now? Was everything justified, despite all the trouble? All things considered, Baba is glad for me now, and he doesnt need to realize what I did. What's more, presently, it will be joyfully ever after, obviously. For what reason would it be a good idea for me to let Hassan ruin that for me? All things considered, isnt he only a Hazara? My Hazara? He is only the sheep I needed to kill to win Baba. What's more, I did it; I won Baba. At the point when I got back with the kite, my blue kite, and Baba had invited me, similar to a saint, at last recognizing my value, I had disregarded it, only for a moment. Also, that felt better. In any case, presently, I am shameful. I will never grow up to resemble Baba, never have a notoriety like his. Never have his nang. Namoos. His respect and his pride. Since I am a weakling, and that is all I try to be. Baba even stated, dislike different young men, and dislike him. Furthermore, hes right. I didn't do anything. I just stood and watched my sheep, my Hassan, get ready to be butchered. And afterward I ran. I didnt need to get injured. I didnt need to confront Assef. I didnt need to spare him. Furthermore, I wish things had turned out another way, I truly do, yet they never could have in light of the fact that I am a quitter. We will compose a custom paper test on Write Amirs journal for the day he witnesses Hassans assault, clarifying his sentiments and why he didn't mediate explicitly for you for just $16.38 $13.9/page Request now We will compose a custom article test on Write Amirs journal for the day he witnesses Hassans assault, clarifying his sentiments and why he didn't intercede explicitly for you FOR ONLY $16.38 $13.9/page Recruit Writer We will compose a custom paper test on Write Amirs journal for the day he witnesses Hassans assault, clarifying his emotions and why he didn't intercede explicitly for you FOR ONLY $16.38 $13.9/page Recruit Writer Baba could never at any point take a gander at me again on the off chance that he comprehended what I did. Ive at long last did right by him, at last won his heart. Yet, that would all change in the event that he knew. What's more, presently Im uncertain with respect to which one Id rather have; Babas love, or Hassans unadulterated commitment. Hassan is the person who has consistently cherished me. His first word was Amir. We had a fellowship, a family relationship that nothing could break, since we had taken care of from a similar bosom. We were the rulers of Kabul. Presently I cannot look at him without flinching. Im excessively scared of what I will see. Does he realize I know? Will he censure me for what was the deal? Or on the other hand more terrible, will he despite everything call me his closest companion, despite everything take a gander at me with sincere dedication? In the event that I were progressively similar to Hassan or Baba, or some other kid my age, I could have battled for him, much the same as he generally accomplishes for me. In any case, presently Im going to battle. Battle against him. How might I live with him continually being here? I dont need Baba giving any of his freshly discovered expressions of love for me to Hassan either. I can be the person who makes his stone bounce the most time now, Im the person who can care for myself, and Im the person who father is pleased with. Presently there will be no explanation concerning why Baba should ever praise Hassan again, and never observe me bomb close to him. Baba will consistently adore me more, starting now and into the foreseeable future. Without Hassan here any more, perhaps I can overlook what I have done, and I can acknowledge Babas love without blame.

Tuesday, August 25, 2020

The Relationship Between Language and Content in Poetry Essay Example

The Relationship Between Language and Content in Poetry Essay Example The Relationship Between Language and Content in Poetry Essay The Relationship Between Language and Content in Poetry Essay Paper Topic: Verse Numerous tallented artists portray words as apparatuses of verbal language used to manufacture a picture in people groups mind and to move a feeling or win a specific reason. David Waggoners Their Bodies, Langston Hughes Share-Croppers, and Ruth Collins The Song of the Factory Worker is three specific sonnets that were examined in correlation styles and the redemption of words. The three sonnets share certain highlights for all intents and purpose. The highlights between the three sonnets identifies with ethnicity, sexual orientation, age, work and the connection between lifes preliminaries. The creator Ruth Collins breaks down the snags ladies confronted working in a manufacturing plant. The Red block working with numerous windows is a similarity to prison or jail dividers. For instance, jail dividers or prison dividers are worked with blocks. Youre like a vampire, for any place I go, you know Im returning to you is a similarity of each course detainees take in the jail framework returns to blocks with no way to get away. This specific sonnet portrays the enormous sounds that exist in the plant. A few sounds were The buzz, hum of the apparatus and The snap of the tacker. Nonetheless, the most intrigued line with regards to the sonnet that stuck in the psyche of the peruser was the worn out peered toward ones. This specific line is a case of each individual having a long, tedious, and occupied day at work. For instance, if Bradley Jordan has a lot of work requests to finish at work, the qualities of his physical appearance toward the day's end is moderate strolling and tired-eyes. The peruser most essential line was the red-haired young lady, when the sun sets her head burning. This line depicts the qualities of a specific lady, working in a plant, keeping up her excellence. The female assembly line laborer will sew until she turns into a drained looked at one. In Langston Hughess sonnet, he conveys a considerably more irate methodology. In the start of the sonnet, he states Just a group of Negroes Driven to the field. This specific line depicts Negroes as quiet livestock, similar to oxens or jackasses. They were required to proceed to work in the cotton field with no acknowledgment of knowledge or individual worth. Langston Hughes transparently communicates his feeling in this sonnet. The explanation for the maltreatment was the skin shading. Hughes is unmistakably furious and vexed in view of the bondage with African American specialists. The maltreatment had no reasonable start and the end won't be forgiving. David Wagoners sonnet, Their Bodies, is an extraordinary and clashing bit of work. Wagoner utilization of illustrations dismembered subjects and communicated poise for the person. He likewise made notice to the peruser that every method was guiltless or once a parent. David clarifies that bodies ought to be taken care of really and amenably. The three sonnets reminded the perusers through representations that a people esteem is especially not dictated by age, sex, or race. Why the people in these specific sonnets retaliate against the misery, torment, and suffocation? In the sonnet The Song of the Factory Worker, Collins portrayed the red block working as an awful medication propensity. The people need to leave, however they are brought back on account of their glad subjugation, the cheerful chuckling and the tunes they sing. This portrayal is much the same as medication someone who is addicted needing to stop drugs. People utilizing drugs need to stop, yet the servitude of a vibe decent high keeps them returning. Langston Hughes communicates a lot of outrage toward suppression and bigotry. He is an African American author, who is irate with himself and his siblings. Hughes doesn't portray alluring components of a lady or excellent hues in a butterfly. Step by step passes by and we are not much, the peruser could envision the Negroes torments and comprehend why they thought there was no expectation. The sweet and settle sonnet was the Their Bodies. This specific sonnet opposes people that secure information as a matter of fact. The body is a powerful vessel that has a name, past, and family. The elderly person is portrayed as scars of steel-plant on the backs of his hands, on the scruff of his neck, on his arms and strong legs. Expecting this is certainly not an otherworldly work of Jesus, the dead body is a marvel. The perusers are reminded to their best to adapt genuinely and obligingly. The three sonnets are composed with phenomenal, amazing, and extraordinary figurative language. Despite the fact that the positions are extraordinary, the plot of every sonnet relates working. Regardless of whether white or dark, old or youthful, female or male, the sonnets show pride for people.

Saturday, August 22, 2020

Self-discovery in Desolation Angels Essay -- Desolation Angels Essays

Self-disclosure in Desolation Angels Stripped to its barest basics, Jack Kerouac's epic Desolation Angels peruses as a medication incited trance of easygoing sex (or dreams thereof), blended into a softening of jazz and verse. The frequently youthful desires of Kerouac's character Jack Duluoz, be that as it may, are unimportant scenes in the quick paced, compose it-as-you-might suspect it, pre-scholarly reputation stage in the life of a man who basically established the Beat age. In spite of the fact that the flooding continuous flow that includes this book appears to be without a doubt unconstrained, Desolation Angels really analyzes, in a generally direct and obviously sorted out way, the condition of human isolation. Dashing from a Forest Service peak station to San Francisco, from Tangiers to London, and slipping from dejection to jazz clubs loaded with felines, from a morphine someone who is addicted's space to the home of his weaving French Canadian mother, the blessed messengers of destruction take on shifting sh apes, constantly trailing Duluoz/Kerouac. The epic starts as Duluoz/Kerouac rises Desolation Peak on Starvation Ridge in the High Cascades for a seventy-day work as a post for woodland fires. He at first envisions with relish the possibility of a confinement that will permit him to contemplate the importance of this presence and enduring and going forward and backward futile without the interruptions of companions, medications or liquor Yet as the days break down into one another perpetually, he starts to feel sick of the repetitiveness of Desolation. The unmistakable void welcome him from his viewpoint mirrors the vacuity of life through his eyes. Entitled Destruction in Solitude, this section records his brain designs as he loses hope over the Void, an unsure substance that represents an interminable, immense, unconcerned power of ... ...r undying dedication to him, and this appears to in part clarify the wellspring of his resentment. He grieves the way that an animal as healthy and unadulterated as she will definitely develop old and bite the dust without leaving an imprint on anybody yet himself and his sister. However in tolerating her mortality, he, without precedent for the book, finds an all-encompassing feeling of harmony. All through the entirety of his prior excursions and ventures, he looked for tranquility, just to be trailed by Desolation. Here, at long last, taking a transport the nation over with solid yet honest Memere, does he abandon them. In seeing this change, the peruser comprehends that steady development can't impact a feeling of spot, as Duluoz/Kerouac had thought all through his transient trips. Just confronting our associations with those we really love can respond to our inquiries in regards to who we are in this stirred up world. Â

Potential Impact Of Online Sales To The Company Marketing Essay

Potential Impact Of Online Sales To The Company Marketing Essay Our Company, Houston Incorporated has chosen to venture into online deals. The objective is to keep on selling our items in the retail locations situated all through the United States yet in addition build up a nearness on the World Wide Web. Your organization has as of late chose to venture into online deals. The organization wishes to keep on selling its items in the retail locations situated all through the United States openings accessible for retail deals and give a report to your director which incorporates the focal points and burdens if showcasing on the web, As Marketing Manager, I was entrusted to inquire about web based advertising openings accessible for retail deals. This report traces the points of interest and drawbacks of web showcasing, the potential effect of online deals to the organization, and the prerequisites for a fruitful internet advertising effort. Showcasing and selling products online electronically is made conceivable by programming programs that execute the fundamental elements of an internet business application. This delicate empowers item show, internet requesting, and web based handling. Web based promoting incorporates both e-business and internet business. Internet business common alludes to exchanges including the trading of cash, for example, offering items to clients. E-business is a more extensive term that incorporates furnishing clients with depictions and particulars for a given item. Internet advertising offer numerous favorable circumstances as this report will appear. Having a nearness on the World Wide Web offers the chance to arrive at clients on a national level as well as all around. Working together multi day a week and 24 hours daily is a reality with web based promoting. The social event and examination of data accumulate by means of web based showcasing is conceivable. This data can be utilized to improve advertising methodologies both on the web and in conventional retail section. The favorable circumstances far exceed the detriments. Increment deals, expanded brand acknowledgment combined with the ease of working on the web prompts increment income. These are just a couple of the general effect of web based promoting. Executing a thorough internet advertising plan envelops for all intents and purposes indistinguishable procedures and strategies from customary showcasing. It likewise requires the foundation of a site for item show, web based requesting, and online installment frameworks to process installments. The choice to venture into online deals is defended by this exploration. Venture into online deals is a substantially more savvy mean of developing the organization. The suggested model is coordination of the customary retail section with the new online arm. This is contrary to building up an absolutely online business. The present showcasing methodologies can be changed to incorporate the online fragment and used to advance the site. Presentation The web is turning into the town square for the worldwide town of tomorrow. That statement was credited to Bill Gates, Cofounder of Microsoft. Tomorrow has come and as per an article on Reuters site, Online retail deals in the United States could reach $248.7 billion by 2014, growing 60 percent from 2009. As Marketing Manager, my main responsibility is to do statistical surveying and create advertise procedures. This report will plot the favorable circumstances and weaknesses if promoting on the web, the focal points and detriments if showcasing on the web, the potential effect of online deals to the organization, and the prerequisites for a fruitful web based advertising effort. The objective of web based advertising, like customary showcasing, is to convey and offer some incentive to the client and oversee associations with clients that advantage the organization and partners. Web based showcasing incorporates both e-business and online business. Web based businesses regular alludes to exchanges including the trading of cash, for example, offering items to clients. E-business is a more extensive term that incorporates giving clients portrayals and particulars for a given item. Showcasing and selling products online electronically is made conceivable by programming programs that execute the principle elements of a web based business application. This delicate empowers item show, web based requesting, and online installment preparing. The upsides of web based advertising, including the capacity to arrive at a bigger market, far exceed the hindrances. Web based offering will in general be serious and may require lower estimating. This is one of only a handful scarcely any hindrances. Foundation of an all around nearness and expanded deals are ways that the organization can be affected. Be that as it may, having a web nearness doesn't ensure achievement. It requires a thorough advertising procedure planned for drawing in new clients to our site. Internet promoting has its own procedure and instruments that add to the accomplishment of showcasing objectives and goals. . Research Findings Points of interest: Like customary business, web based promoting presents numerous points of interest and drawbacks. Notwithstanding, the benefits of web based showcasing altogether exceed its hindrances. Internet promoting can extend the geographic reach of the organization by getting to clients in business sectors where the organization doesn't have a physical nearness. In the internet business world, working together around the world, 7 days per week, 24 hours daily is a reality. (Hossein Bidgoli, 2002) Online Marketing or web based business makes the capacity to sell for all intents and purposes any item that can be sold in a conventional retail condition. Evenings, ends of the week, occasions, and time zones are no obstructions to online business. Internet advertising can likewise arrive at clients that for different reasons can not by and by visit a customary retail location. Another bit of leeway of web based business is the capacity to accumulate extra data about the client by means of devices, for example, treats, email, and online reviews. This data can be utilized to customize advertising endeavors in a manner that can prompt higher exchange volumes. Online business likewise gives expanded adaptability to clients. Clients can make buys without leaving the solace of their homes. The client doesn't need to manage the problem of stopping or the concern of losing contact with their little youngsters introduced by conventional retail strategies. Shopping errands can be cultivated from the security of their homes with a couple of snaps of a mouse. Obviously, expanded deals are the main thing individuals thing about when they think about online market. Statistical surveying shows that online deals are inclining up in spite of the current discouraged retail advertise. . Income produced by online organizations and the online piece of customary retail organizations surpass $96 billion out of 2006, up from $86 billion of every 2004, as per the U.S. Registration Bureau. An addition al bit of leeway of web based advertising is diminished expense. Customary retail organizations have overhead costs that related with internet promoting. These incorporate utilities, protection, store rent, and work. Lower overhead expense by and large outcome in lower in general expense and expanded income. In this way, online development will give the organization an all inclusive nearness at a relative ease. Weaknesses: Web based shopping isn't appealing to all buyers. They refer to the loss of social contact experienced when shopping with others. While numerous scientists don't perceive any crucial contrasts between the conventional and web based purchasing conduct, it is regularly contended that another progression has been added to the internet purchasing process: the progression of building trust or certainty. (Constantinides, 2004) Many customers are worried about the protection and security issues related with working together on the web. Practically 95% of Web clients have declined to give individual data to Web destinations one after another or another when inquired. (Otto Chung, 2000) Credit card misrepresentation, undesirable sales, and utilization of their data for other than its planned object are a couple of the reasons refered to. The trouble in pulling in clients is another weakness to web based advertising. That, combined with expanded rivalry because of the simplicity of relative sh opping incredibly diminishes the engaging quality of internet advertising. Online customers can rapidly get to data from other online organizations and settle on better choices. Actually, a few sites are planned exclusively for that reason. Accordingly, web based evaluating is extremely serious. Furthermore, internet promoting doesn't bear the cost of the purchasers the advantage of inspecting and figuring out the quality and attack of product sold on the web and by and large require the vender to have liberal return and discount approaches. The absence of after deals administration is another worry of online customers. Time additionally is an issue with web based promoting in that buyers can't take quick ownership of their buys and are confronted with included cost for quicker conveyance. Potential effect of online deals to the organization: The best effect on the organization might be the foundation of a universally nearness. This implies organization development at relative minimal effort. . Web based advertising doesn't require the overhead expense related with keeping up a physical store. This outcomes in lower cost, expanded proficiency and more noteworthy overall revenue. Another potential effect, online deals increments in-store deals. Having an online nearness prompts expanded brand acknowledgment and thusly prompts expanded in-store deals. On the other hand, not having an online nearness implies loss of potential significant clients. Internet promoting makes the chance to cooperate with clients. Trade of data encourages item and procedure improvement and can prompt more noteworthy consumer loyalty. It additionally takes into consideration more noteworthy adaptability in that site data, for example, value, item accessibility, and advancement can be promptly balanced in light of economic situations. Data accumulat ed by means of online deals data can be utilized while thinking about future extension of the customary retail activities. Prerequisites for an effective web based advertising effort Creating

Friday, August 21, 2020

Corporation and Profit Retention Essay

Sole Proprietorship: This is by a long shot the most widely recognized type of business. It is the most well-known on the grounds that it is the least demanding to shape. So as to make this sort of business one basically needs to â€Å"hang their shingle out† and let the trade start. Anyway with such restricted oversight likewise comes boundless obligation. Risk Liability presentation with sole ownerships is an immense disadvantage.. The proprietor and the business, legitimately, are indeed the very same. This leaves all the proprietors property ( and the business resources since they are very much the same) in danger. Annual Tax-There are no genuine expense focal points at this level. It is known as a â€Å"pass through† element. The pay that is produced goes through the business to the proprietor. Charges are paid at the individual level. Life span Unless the proprietors will gives explicit heading in the opposite, the business is legitimately connected to the proprietors wellbeing. Since the proprietor and the business are lawfully vague from each other when the proprietor kicks the bucket the business additionally bites the dust. Control-Unlimited control is another alluring nature of Sole Proprietorships. Since lawfully there is no partition you may do with the organization as you see fit. From what administrations are offered to what the logo resembles all choices are the proprietors to make. Benefit Retention-Since the proprietors endeavors alone are liable for the measure of benefit created, they keep everything. After the representatives ( if any ) are paid what is left is the owner’s. Since they have all out control, they may reinvest it in the organization or they make take it hard and fast. Area Since there is no lawful desk work recorded with any state organization, moving areas is as basic as heading to another state and opening for business. That being said on the off chance that you required state permit in the first state, you would require the identical in the new area. Comfort/Burden-There are no authoritative reports that should be recorded with any state office. Proprietor and friends are indissoluble so there is no administrative work saying something else. At the most you may need to document a Doing Business As (D.B.A. ) with your neighborhood charge office to permit you to open a bank in the company’s name. General Partnership: This kind of organization is typically shaped when at least two people with various ranges of abilities get together. Every member carries with them their own understanding and aptitudes so as to make another endeavor. While the liabilities are not bore alone, the accomplices are not protected from them. Risk While they are part in a foreordained rate, the liabilities of a General organization are boundless. There is nothing that is off the table including your own advantages. Personal Tax-There is no genuine assessment cover gave at this level. Pay that is created is â€Å"passed through† to the accomplices. They will pay charges at the individual level. There are in any case, different tax documents that should be rounded out. Life span When an accomplice kicks the bucket the association stops to exist. The accomplices may not give the first organization consent to their beneficiaries. There might be a purchase/sell condition in the articles of organization. Control-Complete control is offered up to a vote of the general accomplices. On the off chance that there is no accord made, the articles of association should direct how the contradiction is taken care of. Benefit Retention-After the business obligations are paid, the accomplices split the net benefit. The articles of organization will for the most part direct the rates, and if no notice is made it is accepted it is part equitably. Area The way that an organization isn't it’s own legitimate element makes it generally simple to move. In the event that there is a market in another area there is almost no that precludes moving. Comfort/Burden-While no state/government records are required, you will require a â€Å"Articles of Partnership† drawn up. This will go about as the local laws/sanction for choices and tasks pushing ahead. There are a couple of tax documents that should be finished by the accomplices at the suitable time. Constrained Partnership: This kind of business is utilized more as a speculation vehicle than a vocation or profession. It permits a venture to be made and cultivated from a separation. On the off chance that you are the constrained accomplice however, you might not play a part in the everyday exercises or the board. Risk As a restricted accomplice your venture is your lone obligation. That being said your stake in the organization is a benefit that individual lenders may come after. Duty As a restricted accomplice your income from the organization is governmentally charged at the individual level. There are different circumstances to maintain a strategic distance from tax collection as a partnership. General accomplices must cover independent work charge. Life span A restricted organization is here and there utilized as a home arranging apparatus. In this way the progression from age to age is truly adjustable. The restricted accomplice may bite the dust and this will have next to no effect on the business. Control-As a constrained accomplice you have nothing to do with the administration or every day exercises of the business. You may not tie the organization to anything as a constrained Partner. A general accomplice runs the day by day activities and settles on the administration choices. Benefit Retention-If you are a restricted accomplice you are qualified for the endless supply of benefit simply after the general accomplice is paid. As a constrained accomplice you have next to no impact over the measure of benefit produced. Area Limited associations can change areas however it is badly arranged and could be extensively progressively costly. A few states order the documenting of tax documents for constrained associations, also a few states have state annual charges. Accommodation/Burden-Articles of Partnership are required. There are a few states witch require enlisting restricted associations, and severe consideration ought to be paid to the exercises witch the IRS considers â€Å"corporate.† C Corporations: C Corporations are a lawful substance unto themselves. They shield the investors, board individuals, and workers from liabilities. They can raise capital by selling segments of the organization, and tremendous expense provisos to protect income. With all the escape clauses anyway are colossal taxation rates, frequently over 30% of the net. Risk An organization is a lawful â€Å"being†. It tends to be sued, or bring legitimate activity against somebody. Subsequently it gives an enormous umbrella to its proprietors and employee’s the same. At the point when impropriety happens it will retain the impacts. Annual Tax-Being it’s own legitimate element isn't modest. The express that the business is situated in could force charges, just as the government corporate expense rate witch is the most noteworthy on the planet. Couple this with the way that the representatives that work there are at that point burdened again at the individual level, and you perceive how rapidly things include. Life span Corporations can possibly keep going forever. Because of the way that authority is so decentralized, one individual getting sick or leaving the organization is close to an obstruction. You could pass on your offers or stake in an organization through legitimate domain arranging. Control-If you were to join your business it could be set up so your family consistently took a load off on the board or consistently had casting a ballot rights at an investors gatherings. Be that as it may, particularly in an open organization, you should act to the greatest advantage of the investors. Nobody individual runs a partnership alone, there are investors, and for the most part board individuals. Authority being so decentralized makes total self-rule exceptionally uncommon. Benefit Retention-As there are numerous proprietors there are additionally numerous hands in the pot. The truth of the matter is that every investor is qualified for a part of the company’s benefit in direct connection to the amount of the organization they own. In firmly held enterprises this could be 3-4 people, yet in a worldwide organization this could be a huge number of individuals. Area The national government doesn't make any partnerships. This is done at the state level. For a partnership to move between various states they would need to record as a remote enterprise. This can get costly and legitimately â€Å"sticky† when manage distinctive state laws and offices. Comfort/Burden-To join a business is generally simple. The test and weight comes in keeping it running and remaining on the best possible side of legitimate. It must record it’s own expense forms, battle with state and nearby laws, keep up the strictest bookkeeping rehearses, direct yearly investors gatherings, all while turning a benefit for its investors. No little undertaking. S Corporations-S Corporations are a legitimate element. They offer a lawful umbrella to their workers and proprietors too. They can raise capital by auctioning off little bits of themselves as stock. The S organization needs to follow indistinguishable severe bookkeeping and revealing strategies from companies, anyway their pay isn't burdened the equivalent. Obligation A S enterprise is a legitimate â€Å"being†. Hence it gives a huge umbrella of insurance for its proprietors and employee’s the same. At the point when wrongdoing happens it will ingest the impacts. Annual Tax-A S organization is a particular expense circumstance. It has the greater part of the announcing and recording prerequisites of a C corp. in any case, takes into account the â€Å"pass through† of income to the people. The organization The S corp. assignment is anyway for government purpose’s just, the express the organization is in will absolutely have it’s own laws. Life span S Corporations can possibly keep going forever. Because of the way that authority is so decentralized, one individual getting sick or leaving the organization is close to a hindrance. You could pass on your offers or stake in an organization through appropriate home arranging. You could likewise take a load off on the board held for your family/beneficiaries. Control-The truth of the matter is the point at which a S Corporation is shaped the partnership needs to do what is best for itself. A ton like

Wednesday, August 5, 2020

New Year, New Tradition

New Year, New “Tradition” Today is Chinese New Years Eve and I consider tomorrow another brand new start of my life. Tonight, I will feast with my friends on  a lot of Chinese dishes, video chat with my family, and wait to “grab” red packets on WeChat, which is a commonly used Chat APP on our cell phones. During traditional Chinese New Year, the people who are relatively older in the family will put money inside red packets and give them to younger kids. The money will be used to buy things that parents usually do not allow us to have too much of, such as snacks and toys. When I was young, I considered those red pockets a huge amount of money, and the Spring Festival is my favorite holiday because of surprising incomes. Sometimes, parents will deposit the money for us in the bank and teach us the idea of saving. In recent years, more and more people use WeChat to send and receive digital “red packets.” The most interesting part is definitely “grabbing.” The number of red packets sent out are usually limited and the money inside varies. I  feel extremely excited when I grab one successfully and get the best luck. When I talked with friends this morning, everyone was kind of complaining that they could not concentrate in class because they were so busy grabbing red packets on their phones. Usually, the red pockets can  be opened in less than 1 minute and leave other people nothing. Later, some of my friends in CS posted Python codes to help us to grab automatically. After a couple tries, I have to announce that it was useless and I would be rather sitting inside Grainger and staring at my phone with some help from the high-speed Wi-Fi. As we grow up and experience many other exciting things, we think our Chinese New Year is more and more boring. However, we always try our best to make it fun and memorable. I really like our new tradition of grabbing packets because people are more connected. This year, I sent a lot of red packets and wishes to my friends and families, and I hope everyone can enjoy this season and good luck for the next year. Here is a red packet from my BFF. Connie Class of 2018 I am double majoring in Computer Engineering in the College of Engineering and Statistics in the College of Liberal Arts and Sciences. My hometown is a historical and peaceful city called Suzhou, located in southeastern China.

Thursday, June 25, 2020

Tips from a Physics Tutor Geometric Intuition, Part I - Vectors

Welcome back to our series of posts on building your physical intuition for E+M! In this series, we’ve looked at some physical reasoning behind Coulomb’s law, imagining point charges as radiating electric field, and saw that the Biot-Savart law gives an analogous result for magnetic fields. We then took the intuition that we’d developed for point charges and currents, and scaled it up to look at long wires and infinite sheets of charge and current. Up until now, we’ve focused on the magnitude of the electric or magnetic field. How can we easily use our physical intuition to determine the direction of the field as well? Use the geometry of the problem! Often, the first step in figuring out how to solve a problem is to look at the information the problem gives you! You should try to practice the strategy of examining the pieces of information that a problem gives you, and using them as a starting point to figure out how the pieces fit together. This strategy is extremely useful when thinking about physics intuitively, or working through the quantitative sections of the SAT or GRE. Let’s start with a simple example: finding the electric field at point P due to a point charge at point O. The only relevant vector in the problem is the displacement r, which points from the charge at O to our observation point at P. We already know that the electric field points directly towards or away from a point charge, but this is a subtly different way of thinking about it. The field is either parallel or anti-parallel to the displacement r because that is the only direction in the problem; where else could the field possibly point? What if there is more than one relevant direction in a problem? Consider the magnetic field due to a wire carrying a current I. Here, I made the current I a vector because we need to consider its direction along with the displacement r. Here, the answer is the cross-product I x r, which is perpendicular to both I and r. Again, we find out something that we already know, that the magnetic field curls around a current-carrying wire. This time, let’s think of it this way: there are two vectors in the problem and our answer needs to be a vector, so a logical choice is the cross-product of the two vectors. Hopefully, this strategy should remind you of dimensional analysis. The two techniques share a similar deductive spirit. Using dimensional analysis, you recognize that you need to put together an acceleration and a length to find a time, for example, and you realize that you can only combine them in certain ways to make the units work out. Here, you recognize that you need to put together either one or two vectors to form another vector, and there are only certain ways you can do that. The Cross-Product: A very useful concept! If you are not familiar the cross-product, the concept is simple: Say c = a x b, where a, b, and c are all vectors. The vector c is perpendicular to both a and b, and its magnitude is given by c = ab sin(ÃŽ ¸), where ÃŽ ¸ is the angle between a and b. To figure out the specific direction of c relative to a and b, you can use the familiar right hand rule: If you hold your hand as pictured above, then a points along your pointer finger, b points along your middle finger, and the cross-product c points along your thumb. The choice to use a cross-product seems arbitrary. How can I decide if I should or not? So, one vector in the problem means the answer is parallel or anti-parallel to that vector, while two vectors in the problem means the answer is parallel or anti-parallel to their cross-product? As with many sweepingly general questions, the answer is yes but no. Yes, in that the rule is very commonly true. No, in that there are many exceptions, and simply committing a rule of thumb to memory without thinking about why such a pattern exists misses the point (and the fun) of science. Cross-products tend to arise when two physical quantities that both have directions interact, and the result is some effect that also has a direction. By contrast, when you only have one physical quantity that has a direction, it tends to create effects that point either along with or opposite to its direction. This statement was abstract and a bit vague, so let’s illustrate it with some examples. Consider an electron moving in either a magnetic or electric field. For the magnetic field case, the Lorentz force law tells us that the force depends on the direction of the magnetic field relative to the direction of the electron’s motion. Since we have two quantities with direction – the field and the electron’s velocity – interacting, the next logical step is to take their cross-product. If the electron were moving in an electric field, however, the force would only depend on the direction of the electric field and the magnitude of the electron’s charge. Since nature doesn’t care where the electron is moving, the electric field should only create a force parallel or anti-parallel to its own direction. A useful analogy between E+M and mechanics We can draw an analogy here between electric versus magnetic fields on the one hand, and linear versus rotational motion on the other. In both cases, there are deep similarities between the two concepts being compared. We’ve already explored some of the parallels between electricity and magnetism, and you have probably noticed that linear and angular motion involve several of the same quantities – velocity, momentum, mass/moment of inertia, force/torque – arranged in analogous ways. For electricity and linear motion, we are dealing with fields and motion relative to a point. What is the electric field due to this collection of point charges? The car starts at this point and accelerates eastward, so what are its velocity and displacement? The point charge and the car’s origin have no direction; they simply exist at a given location. Here, all the calculations generally involve motion/acceleration/fields/forces parallel to some direction or another; this is why we can decouple vertical from horizontal motion when considering the flight of a cannonball, for example. For magnetism and rotational motion, the fields and motion depend intimately on some vector. What is the magnetic field due to a current moving in this direction? What is the angular momentum of a top spinning around that axis of rotation? In these cases, we need to know where the current is pointing relative to our observation point, or how all the bits of mass in the top are moving relative to the top’s center in order to answer the question. In these contexts, the cross-product – the simplest way math offers to combine two vectors representing different physical quantities to form a new vector – is ubiquitous. Some less obvious E+M examples To drive home the idea of considering the vectors involved to find an electric or magnetic field, let’s return to the example of an infinite plane of charge or current. We’ve already seen that the magnitude of the electric or magnetic field produced by the infinite plane does not depend on the distance from the plane, but what about the direction of the field? Let’s first think about the vectors in the problem. How do you characterize the direction of a plane? Consider describing the direction of the surface of a table. There are an infinite number of vectors that lie in the plane, just as you can put your pencil on the table and point it north, or east, or south-by-southwest, etc. The best way to describe the table is to say that it is horizontal. That is, no matter how you place your pencil, it will always be perpendicular to vertical. Mathematically, then, the best way to describe the orientation of a plane is to give the direction of its normal vector, the vector the sticks straight out of the plane at a 90 degree angle all around. For an infinite plane of charge, the electric field must point either parallel or anti-parallel to the only direction in the problem. That is, the electric field at all points must point directly toward or away from the plane, depending on the sign of the plane’s charge. Intuitively, this makes perfect sense. Imagine flying in an airplane above a perfectly smooth sea. North, south, east, and west are meaningless to you, and the only directions you can distinguish are up and down. For an infinite plane of current, you have the direction that defines the orientation of the plane and the direction of the current within the plane. If we take the cross-product of these two vectors, we find that the magnetic field flows parallel to the direction of the plane, but perpendicular to the direction of the current. Again, this makes perfect intuitive sense. Picture boxes in a warehouse sliding along a track of rollers. For each roller, the surface of the cylinder spins around the roller’s center, much like a single current-carrying wire creates a field that wraps around the wire. Placed closely enough together, though, the rollers create a smooth horizontal motion, and the surface of one roller comes up to meet the box as the surface of the previous roller drops away. Analogously, if you imagine the infinite plane of current as a flat collection of wires stuck together, then the wires together create a magnetic field that flows smoothly along the surface of the pl ane, while the components of the individual fields that point toward or away from the plane are cancelled away. Two important tools in your geometric intuition toolbox Looking at the vectors given to you in a problem is sometimes not enough to give you your answer. Consider a ring of charge, an electrified donut, and you need to find the field in the center of the hole. Using the analysis we described above, we might say that the electric field points straight out of the hole, perpendicular to the diameter of the ring. This answer, however, is incorrect. In addition to considering the geometry of the problem, we must also consider its symmetry! In the next post, we’ll explore how symmetry and geometry together can be a powerful combo for helping you reason through physics problems. ;