Who Invented the Lightbulb

On October 21st, 1879, in one of the most famous scientific tests in history, Thomas Edison debuted his signature invention: a safe, affordable, and easily-reproducible incandescent lightbulb that burned for thirteen and a half hours. Bulbs tested following that lasted for 40 hours. Although Edison cannot fairly be credited as the sole inventor of the lightbulb, his final product—the result of years of collaboration and testing alongside other engineers—revolutionized the modern industrial economy. Below is a timeline of major milestones in the development of this world-changing invention. Inventor Timeline 1809 - Humphry Davy, an English chemist, invented the first electric light. Davy connected two wires to a battery and attached a charcoal strip between the other ends of the wires. The charged carbon glowed, making what became known as the first-ever Electric Arc Lamp. 1820 - Warren de la Rue enclosed a platinum coil in an evacuated tube and passed an electric current through it. His lamp design was worked but the cost of the precious metal platinum made this an impossible invention for wide-spread use. 1835 - James Bowman Lindsay demonstrated a constant electric lighting system using a prototype lightbulb. 1850 - Edward Shepard invented an electrical incandescent arc lamp using a charcoal filament. Joseph Wilson Swan started working with carbonized paper filaments the same year. 1854 - Heinrich Gà ¶bel, a German watchmaker, invented the first true lightbulb. He used a carbonized bamboo filament placed inside a glass bulb. 1875 - Herman Sprengel invented the mercury vacuum pump making it possible to develop a practical electric lightbulb. As de la Rue had discovered, by creating a vacuum inside the bulb an eliminating gasses, the light would cut down on blackening within the bulb and allow the filament to last longer.   1875 - Henry Woodward and Matthew Evans patented a light bulb. 1878 - Sir Joseph Wilson Swan (1828-1914), an English physicist, was the first person to invent a practical and longer-lasting electric lightbulb (13.5 hours). Swan used a carbon fiber filament derived from cotton. 1879 - Thomas Alva Edison invented a carbon filament that burned for forty hours. Edison placed his filament in an oxygen-less bulb. (Edison evolved his designs for the lightbulb based on the 1875 patent he purchased from inventors, Henry Woodward, and Matthew Evans.) by 1880 his bulbs lasted 600 hours  and were reliable enough to become a marketable enterprise.   1912  - Irving Langmuir developed argon and nitrogen-filled bulb, a tightly coiled filament and a hydrogel coating on the inside of the bulb, all of which improved the efficiency and durability of the bulb.

I Have A Good Writer - 949 Words

Throughout this past year, I have learned a lot about the world, statistics, and, perhaps most importantly, myself. I have learned that I love the world and I have statistics. One of the most important things I have learned this year is that I have potential. I have potential to be a good writer. I have always loved writing and reading. Maybe it is because my mother imprinted it upon my brother and myself to read a lot. Perhaps it is because I truly love the smell and feel of books, or the release you get from writing out what you have been keeping inside. Either way, I have loved writing and reading, and this year I truly learned what it means to be a writer. In previous years, there has always been an understanding between students and their teachers about writing. You, as the student, write EXACTLY what is expected of you and they, as the teacher, grade accordingly. In this class, Dual Enrollment, while there is a certain standard for your writing, one has the freedom to truly express what it is they want to say. So to have that freedom, and a teacher who does not caudle you with your work, one can really flourish and improve his or her writing skills. For example: in the previous sentence, I wrote, â€Å"†¦his or her†¦Ã¢â‚¬ , but originally I had written, â₠¬Å"†¦their†¦Ã¢â‚¬ ; that was incorrect. In the beginning of the year, we were tasked with writing our first essay; a narrative. My narrative was about something that happened years ago that traumatized me. Being able to get out what hadShow MoreRelatedMy Strengths And Strengths Of My Weaknesses1162 Words   |  5 Pageshas to offer, however, the only way I made it out alive was to leave the writer I thought I was in the past. There are challenges along the way that tested my strengths and showed my weaknesses. Also, I was able to realize the type of writer I am and the writer that I am not. English 1101, teaches the elements of writing allowing studentto understand themselves as writers; with the hope that by the end of the semester the students will be stronger writers. I have reached the end of English 1101 andRead MoreThe Freedom Of Being A Writer961 Words   |  4 Pagesâ€Å"The writer must have a good imagination to begin with, but the imagination has to be muscular, which means it must be exercised in a disciplin ed way, day in and day out, by writing, failing, succeeding and revising, some great words from Stephen King, shows us the independence of being a writer with the many faults and achievements. These words mean something to a lot of people, which can lead them to a positive path to know that the great Stephen King, can mess up occasionally as well. The peopleRead MoreRevising a Paper1863 Words   |  7 Pagespaper’s perspective. At first, I thought revision was just fixing commas, grammar and spelling, but no, fixing minor errors like grammar, spelling and punctuation are called, proofreading. Proofreading is an important step before turning in a paper, but if the ideas are predictable, the thesis is weak, and the organization of the paper is a mess, then proofreading will just act like a band aid to cover the little scars on the paper. Writing is a process of discovery, and writers don’t always produce theRead More Writing Style Essay1326 Words   |  6 PagesWriting Style I hear inner Strunk and White voices of â€Å"don’t overwrite†, â€Å"write in a way that comes naturally,† and so forth, going through my head. I have visions of endless Williams examples and illustrations on clarity. I see weeks of blog writings flashing through my memory. From all of this, I now own and believe in a firm and personal definition of what style is and what good writing entails. William Strunk and E.B. White’s book The Elements of Style, along with JosephRead MoreProcess Of Writing : Writing1232 Words   |  5 Pagesreply?† If you think about it, it’s true, and I believe most of us just listen to reply. Writing skills can never be separated from important skills such as quotation, citation, grammar and spelling. If a writer can establish those tools in combination with each other, then the writing process becomes easier than ever. The most important thing is that writing good takes time and effort. Writing its elf may sound easy thing to do, however, a good writer is someone who feels everything around him orRead MoreSports Journalism : Career Goals1669 Words   |  7 PagesThe tasks at hand faced daily by a writer, qualifications that need to be met, and opportunities with pursuing a career in sports journalism. I am focusing more on the job of a sports writer. A career in sports journalism would be a good career for me because sports are intriguing to me, I view this career as an achievable career, and the job fits my lifestyle. Per Shelly Field, sports writers can work for local newspapers, large publishers, or magazines. The writer is given a certain topic to writeRead More The Character of the Hitchhiker in The Hitchhiker by Roald Dahl1182 Words   |  5 Pagesthat involves an interesting character. The writer makes this character very realistic. When I read this story I found the character had many good points but also many bad points. The Hitchhiker by Roald Dahl is about the writer who has a brand new car. The writer heads to London in his new car. On the way, he picks up a hitchhiker. The hitchhiker is going to the horse racing. When their driving on the road, the hitchhiker encourages the writer to go faster and faster. They are then stoppedRead MoreWhite Males And The American Writers922 Words   |  4 PagesAfrican American writers represented. This isn’t because they don’t exist, but because the more commonly known writers have the attributes of being more respected, and are widely accepted writers in American literature, who majority of the time are white males like Thoreau and Leopold. These are just examples, and they are good writers but there are also good African American writers that deserve just as much representation when teaching college courses. There’s a greater choice of writers besides havingRead MoreThe Ideal Writing Process Is A Very Generic Way Of Writing884 Words   |  4 Pagesof the rubric. After finding a topic start with a prewrite or an outline to help the writer get their thoughts together. Once this is done finding creditable resources that well make the paper stronger and give the writer more creditably. The writer then writes his rough draft that has all the elements that the outline had. Putting in all the recourse and following the format of the paper. Making sure the writer stays on topic though the paper. Once the rough draft is done, then they begin to reviseRead MoreAnalysis Of The English Class, My Eyes Opened At New Techniques927 Words   |  4 Pagesit required more work and research; however, writing these essays helped me to grow as a better writer. During these essay writing process, I was able to grab a sense of what is and what is not essential when writing an essay and to remember to avoid diverging from the essay topic itself. Out of the four essays- Arguing a Position, Proposing a Solution Justifying an Evaluation, and Analyzing Stories- I believed that Justifying an Evaluation was the easiest for me to write. Compared to the other essays

Siomai Business Proposal free essay sample

Siomai is one of the bestseller in food business industry nowadays and many people find it a good business venture. It is a very versatile dish. It can be eaten solo as a snack, or served with rice to make a full meal, so you can sell it anytime of the day. Ingredients for making siomai are readily available in supermarkets and public markets; some you’ll even find in your own kitchen right now. Plan Location of the Business The business is planning to locate in place near at school and in the neighborhood because of mass number of people on those places. Siomai making and selling is a very good business to look forward for. It can be sold anytime and almost anywhere. Having this kind of business requires time and effort as well as right marketing strategies. This business is in terms of food in which we have to make sure that the business observes cleanliness and right sanitation should be observed. We will write a custom essay sample on Siomai Business Proposal or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page The objective of Siomai business is to bring affordable food without losing its delicious taste. This business doesn’t require a big profit; in addition, it aims to help those people who are staying at home to earn profit and to make them more productive. Since we are planning a location near at school, and on neighborhood, our target market are mostly students and people who passes as well as people who stays on their houses and craving for some food/s to eat. Competitors Small businesses have many competitors all around them. Like in school, there are lots of food carts as well as canteens who sells different foods that sometimes Siomai is also one of their offered food. Likewise, selling on the neighborhood can also have lots of competitors, like carinderias and some food carts that are roaming around. How does your product differ from others? We will make sure that our product (Siomai) would be different from other siomai businesses as well as our other competitors in terms of taste and service that we will offer. (yung mga prices na tska yung kikitain) How will you meet the demand, beat competitors and operate profits? Pork Siomai Ingredients: 1 kg ground pork (suggested proportion of fat to lean meat is 1:3) 1/3 cup chopped water chestnuts or turnips (singkamas) 3/4 cup chopped carrots 2 tbsp or 4 cloves minced garlic 2 medium or 1 large minced onion(s) bunch of spring onions or leeks 1 egg 5 tablespoons sesame oil 1 teaspoon freshly ground pepper 1 teaspoon salt 5 g seasonings 50 pcs. large or 100 pcs. small wanton or siomai wrapper Soy sauce, calamansi (lemon or kumquats), sesame oil and chilli paste (for the sauce) Siomai Cooking Instructions: Mix all the ingredients for the filling in a bowl. Arrange 10 wrappers in a tray, and weigh 100 g of siomai mixture. Place 2 tsp of meat in each wrapper until nothing is left unfilled. Each wrapper will have 10 grams of siomai. To enclose, gather up the edges of the wrapper and gently fold it so that it forms a basket shape, with the top of the filling exposed. Press lightly as you pleat each side. Or, if you dont want to expose the filling, use a bigger wrapper. Do the same to the remaining meat mixture. Meanwhile, boil water and brush steamer with oil. When the water gets to a rolling boil, arrange the siomai in the steamer and let stand for 15-20 minutes, longer for larger pieces. Serve with soy sauce, calamansi and sesame oil. Chilli paste is optional. Chili Sauce for Siomai: 1/8 kilo Chillies (Siling Labuyo) 3 tablespoons cooking oil 2 cloves garlic, peeled and minced dried shrimp or meat finely chopped or grind (Adds more flavor but optional) Siomai Chilli Sauce Cooking Instruction: Combine chopped chillies, dried shrimp or meat and minced garlic then simmer for around 20 minutes or till most of the water has evaporated. Add oil, simmer and stir well. Put your cooked Siomai in a nice packaging when planning to sell it. Siomai can be marketed in schools, offices, or to your neighbors. How to Start a Siomai Business 1. Name your business In choosing a name for your business, it has to be something related to your product, unique and easy to remember. 2. Register your business To make your business legal and functional there are several government agencies you have to register with. Learn how to make siomai Do you know how to make your own specialty siomai thats so awesome you know everyone will want it. If you do then great. If not, then youd better learn. 4. Make your own food cart You dont need anything huge right away. Getting a very basic cart is all you need to get started. Food carts are easy to set up, requires low capital and is cheaper than putting up a restaurant. 5. Find a good location Look for a place that is in a commercial area where there is heavy foot traffic like in malls, train stations, terminals, schools and office areas. Having positioned your business in a good place means lots of income. 6. Market your product Dont be so confident thats because your business is located in a heavy foot traffic area people will notice it. Sorry, but no. You have to make a noise so that people will know that you are selling something for them. Make something that people will always comeback for your product. Dont settle for less. 7. Save your profit Save all the money you can. Once youre business grows you can expand to other locations and add more products being offered.

Research Proposal on Leadership and Motivation Essay Example

Research Proposal on Leadership and Motivation Essay Leadership is the state of being the head of the particular team or group which has to fulfill the definite work. Leadership is intimately connected with motivation because the primary task of the leader of the group is to encourage the team and their work. Naturally, every group of people united with the particular idea requires a strong and capable leader who would direct the activity of the group and improve the quality of its work. Leaders exist everywhere – at school, university, company, official political organization, etc. The most common use of the term leader is met in business because every firm requires a leader who will control and maintain the process of work and the employees’ activity. Motivation and its types depend on the style of leadership practiced by the head of the team. There are several most common approaches towards motivation – the method of reward and punishment, encouragement with money, freedom of thought and decision making, etc. If the leader is a smart and skillful one and possesses knowledge of human psychology, he will be able to communicate with employees properly. If the employee feels the support, encouragement and warm advice from the boss’ side, he will try to fulfill his duties in the best way. The main work of the leader is not to control the quality of work strictly, but to develop the employee’s creativity, responsibility, professionalism and other skills. He has just to live the right direction of work and provide the team with the sober, constructive and professional piece of advice. We will write a custom essay sample on Research Proposal on Leadership and Motivation specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Research Proposal on Leadership and Motivation specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Research Proposal on Leadership and Motivation specifically for you FOR ONLY $16.38 $13.9/page Hire Writer The student who is interested in the research of the problem on leadership and motivation can prepare an exciting project which would illustrate the essential points related to the issue. The young person should understand that the quality of the research project depends on many factors: the type of information, its volume, the relevance of the problem, the usefulness of the facts, the style and manner of writing. To succeed in proposal writing one should brainstorm the best points and questions for the project which require research and present them briefly in the logical order. Finally, one can demonstrate the methods used for the analysis to prove to the professor that the issue of leadership and motivation is research from all sides. The student who requires a helpful hint for writing can find a professional piece of advice in a free example research proposal on leadership and motivation designed by the writer who is good at this matter. A free sample research proposal on leadership and motivation can be quite useful if one needs help with the formatting of the paper and the appropriate logical composition of the text. At EssayLib.com writing service you can order a custom research proposal on Leadership and Motivation topics. Your proposal will be written from scratch. We hire top-rated PhD and Master’s writers only to provide students with professional research proposal help at affordable rates. Each customer will get a non-plagiarized paper with timely delivery. Just visit our website and fill in the order form with all proposal details: Enjoy professional research proposal writing service!