Milk Food Coloring Lab Report (Importance of Surfactant) Essays

Milk Food Coloring Lab Report (Importance of Surfactant) Essays Milk Food Coloring Lab Report (Importance of Surfactant) Paper Milk Food Coloring Lab Report (Importance of Surfactant) Paper For this experiment, we will be using milk and food coloring to represent the water (milk) and gas (food coloring) in the respiratory system, as seen in the liquid-gas boundary of the alveolar wall (water) and its volume (gas). We will place the milk in a shallow dish so that it completely covers the bottom of the dish. Drops of food coloring are going to be added into the milk at the center of the dish, and then observed. Drops of liquid dishwashing soap, representing surfactant, are then added to the center as well. Once the soap drops are added we will observe what changes happen to the food coloring and milk. Because I know milk is non-polar and food coloring is polar, my hypothesis predicts the two will not mix voluntarily at first, but the soap acting as a surfactant, when added, will help the two liquids mix together. Materials and Methods For this experiment, I used a jazz milk, 4 different color food coloring bottles, liquid hand soap, and a small clear dish with approximately 5 inches in diameter. Placed the dish in a flat steady surface. I then poured the milk making sure the whole bottom of the dish is covered and still remained shallow. Next, I added about four drops of food coloring to the milk at the center of the dish. Lastly, I added about four drops of the liquid hand soap in the same exact place where I had added the food coloring. Results When the food coloring was added into the milk, there was no reaction. The food coloring did not mix into the milk, it just sat there clumped together like oil in a lava lamp. After adding the drops of liquid soap, the food coloring droplets rapidly mixed into the milk by running in every direction. It looked like an explosion of color. The color streaks continuously span slowly in the milk. Discussion As my hypothesis stated, the milk and food coloring did not mix voluntarily because of their polarity. Nan-polar molecules want to bond with other Nan-polar molecules (London dispersion forces) and polar molecules bond with the polar molecules (Dipole-Dipole forces). Think of all the milk molecules acting as very powerful magnets between each other, and the same with the water molecules. In this case, the soap -acting as the surfactant- broke the surface tension between the two liquids allowing them to mix together. In other words, it reduced the magnetic attraction between them. As we stated, the milk molecules are non-polar and the food coloring molecules are polar. Soap is one of the awesome liquids that is both polar and non-polar. Its molecules have a polar head, which attracts other polar molecules, and a non-polar body, which attracts other Nan-polar molecules. When the liquid soap molecules were added to the solution, they attracted both the milk and food coloring molecules causing them to mix like they did. In the alveoli, the gas is non-polar and the water in the walls of the alveoli is polar. Surface tension in the alveoli is very high because of the liquid/gas boundary. This surface tension draws the liquid molecules closer together and reduces their contact with the gas molecules; this way the alveoli do not collapse. The water in the walls of the alveoli help the alveolar walls come together during exhalation (when the oxygen leaves the alveoli), so that they stick together and allow the alveoli to reach their smallest size. The surfactant that is secreted aids the walls to be able to come together, but not with the attraction of their potential because its too strong. If they came together with their normal attraction, the walls would stick together and their strong surface tension would not allow them to unstuck. A collapsed alveolar will have to be completely re- inflated during each inspiration, which takes a lot of energy to do. With the surfactant, during inhalation the incoming gas is able to split the walls open because their attraction is not as strong. This way, the walls are able to come apart easier and make more space for the oxygen that fills up the alveoli. If our alveolar cells did not produce surfactant whatsoever, breathing would be very hard. Each inhalation would not have the easy flow it has now; it would take a lot of energy and not to mention be tougher. Conclusion Just like the water and gas in our lungs, the milk and food coloring would not have been able to mix. Both the liquid soap and the surfactant reduce the genetic force that unites liquid molecules- in this case allowing milk and food coloring to mix.

Statement by the President on Cuba Policy Changes Essay

Statement by the President on Cuba Policy Changes - Essay Example This rhetoric began a speech that not only asked me to re-examine what I know about the history of America and Cuba as allies and foes but also changed the way that I now view the historical lessons taught to me. This particular speech was highly effective because of Pres. Obama did not only use the story of other people to support his claims of the need to change the American policy pertaining to Cuba, but he used historical analysis and evidence to help support his claims. Evidence that gave credibility to his claims and offered a chance for the American people to make up their own minds regarding the logic or mistakes that lifting the embargo might bring about. By clearly explaining the history of the embargo and its  effectiveness as an international policy, we, the listeners, came to better understand the logic and practicality of his reasons for lifting the ban. In the end, Pres. Obama left the stage having convinced a number of listeners and leaving some to ponder the direct ion that his new Cuban policy might lead the United States into.   

Womens rights and how women got them what they went through to get Research Paper

Womens rights and how women got them what they went through to get them - Research Paper Example In general, it absorbs a critique of gender discrimination; more particularly, it contains the encouragement of women's interests and welfare (Duggan, 1979). It can be said that the first wave of feminism started in the early 1848 and it lasted till the 1960s after which the women started getting their rights. However some argue that the movement ended in the 1920s as the constitution to allow women to vote was passed in this very year.. This essay would further prove this claim by giving an overview about the first wave of feminism in the United States and its drawbacks (William 1969) Women have been treated as inferior to the men in every segment of this world until they fight for their rights to be served as equal to the men. The first wave of feminism started in 1868 and lasted till the 1960s in the United States (William 1969). The main aim of this feminist movement was to retain the rights of women in the country. Before the first wave of feminism took place the condition of wo men in the United States was miserable. The women were not allowed to vote and had no shares when it came to property rights. Wives did not have any rights when it came to justice over their husbands as they were not allowed to file any petition in case of any harshness.... f the first feminist movement proved quite successful in achieving their objectives but on the other hand they were not successful enough to provide all the necessary rights to women living in the United States and thus other similar movements had to come into play so that these rights were also achieved for the women. It basically revolved around the issues of seeing women as sexual objects, their individual identity, their right to vote, the issues which they faced in their work places and healthcare. The first wave was brought about by different groups which were then known by different names such as the Abolitionist groups and the Women Rights Organizations (Clarke 1974). The women in the first wave demanded moral equality to the levels of a man. The most important issue which the feminists pursued was to achieve individual status for women living in the United States. In other words they wanted a woman to represent the community of women living in the county. In order to pursue all these rights the women set out with different conventions and marches so that their demands could be accepted by the government. In 1848 the famous ‘Declaration of Sentiments’ was announced which became the basic principle of the movement which was going on in the United States. Similarly this was followed by the formation of different organizations which worked towards achieving the rights which the women were previously deprived of. Following this the organizations in achieving rights for women seemed successful as the women were provided with rights to property ownership and child custody. They also provided workplace laws which helped to women to participate more in the working sector. In 1920 the Nineteenth Amendment to the constitution of United States took place and this gave

Persuasive effect Essay Example for Free

Persuasive effect Essay How is the writing persuasive? Work through the article commenting on how the choice of words, the style of the writing and the way the information is presented work together to create this persuasive effect. Several techniques are used in the writing to persuade us, to her side of the argument. The first one we meet is the large, bold title of ZOOOOOOH! Tthis is attention grabbing and the linguistic cleverness combines the subject of the article, zoo and the idiotic reactions of the visitors, i. e. Ooooooh. The title has a subtle meaning; it has in it the mindless, moronic reactions of the visitors on seeing the animals, and the graphic design cleverly manipulates our thoughts on the critical comments on zoos. Also there are a line of animal pictures on the bottom of the page, this is to create a sense of realism through illustrations. The sub-heading is in bold as well though it is not as large as the title, this play on words is reflected by the way that she combines her anecdote with an inverted situation, Tess Lemmon watches people watching animals. The effect of that being that it is a play on words with an element of graphic design and it makes us want to read the article and it subtly introduce the idea that she is analysing the reactions of the people, as if in a scientific way. The quotes in bold below the sub-heading are for entertainment, she deliberately takes the most inane comments from the people that she watches and let them argue the case for her, this is called Aunt Sally she has quoted the opposition and has reiterated the quotes for her own needs, the entertainment is in fact a secondary purpose to the real purpose of summing up the attitudes to the animals that the visitors feel in the zoo and shaming them and parodying it. The last quote is the most stupid of them all and has been given its own extra space for its summing up of her views and thoughts on the subject. The first paragraph is devoted nearly entirely to the technique of making short, sharp points, lies on a slab of concrete, stares into space, flicks its tail. People stop, make comments, then go this has the effect of making us think about what the visitors do, because she has summarised what they do in one short paragraph. Exaggeration is also used (which is also called hyperbole), the tiger lies on a slab of concrete, this makes it sounds worse than it is especially as she has generalised the idea of that all the animals lie on a slab of concrete in all zoos while there may be some exceptions, this is bias. This stresses her point of animals in a cell and lying on a slab of concrete without anything to do and living in an unnatural environment, the short sentences also leads us on to the arguments of zoos. She also uses Aunt Sally to a great effect with quoting, a good day out, this makes a point to us of her sarcasm towards the idea of going to the zoo for entertainment and a parodying subject. She uses colloquial language, But hang on a minute running aroundin our backyards, this is used to convey ideas to the reader through an easier way, the effect is, that of an friend having an conversation with you, it is used to put us at ease to seem that she can be trusted, and the language involves everyone, especially using the possessive adjective our and Were this effect in context with colloquial language is that the piece becomes avuncular and inclusive and it invites us to contribute, this makes the writer identify herself with the readers, this encourages the readers to agree with her view and to make us sympathetic to her views. She also uses a rhetorical question, Whatever is in this day and age? to lead on to her arguments, this question makes us feel involved, as it seems as if she cares about our own opinions, it also adds emphasis and stresses the point that we can not allow an animal in a cage, they have the same effect as the use of directives-they make you think that the writer is talking to you personally. The exaggerated tone of the question makes us think about the point of the question and agree with her. This paragraph has a certain amount of sarcasm and Aunt Sally in it, the exaggeration in, the tiger is living it up like nobodys business. Makes the zoo director sound bad, and the section of, saved from having to earn it doesnt even have to walk anywhere. In it one can detect the sarcasm of her writing, on quoting the zoo director. The quote in itself makes the animals sounds quite like prisoners really, with their meals handed to it on a plate, and it doesnt even have to walk anywhere, the effect of that compared with the fact she hints to us about the, zoo directors office is that of the zoos using the animals as exhibits to make themselves rich. Also the tone of, with his tongue only half way in his cheek, brings out the bad habits of the person that she has interviewed the effect of that is to present to us negative opinion of him and also the sentence has a literal meaning as well, of not meaning what you say so that the effect is she doesnt want us to take his views seriously. Also an Aunt Sally was used in describing the zoos as an, Welfare state, this suggests to us that she does not agree with the views of the zoo director and it is an irony that the zoos are described as an, welfare state. Another Aunt Sally is used to great effect in describing her feelings to the reasons trotted out by the zoo whenever their existence is challenged. Also the words in quotations, an ambassador for the wild is there because it reinforces her opinions of zoos and their well-used phrases, as she doesnt believe them. She uses her title of, as an anthropologist This gives credibility to her article and research as we think she would give an unbiased opinion, but in fact this is a trick so that we think she is not biased, but rather using the title, she hides herself and still, gives us the biased opinions under the pretence of being a scientist, having spent hours She repeats herself once more as she says, watching people watching animals, this merely emphasis the point that her subject is on humans and repeating the point in the sub-headings, this is also an anecdote so that we believe in her because she has experience. She then goes on to say her conclusions after giving us her title of an anthropologist and make her sound more reliable, she goes on to say about her opinions of zoos, it is almost a directive/imperative language as she says, no zoo can fulfil no zoo can bring about presents a distorted picture this almost commands us to believe in her research and her conclusion. Also another important is the use of 3 words grouped together, good, bad, best in the world the good, bad, best, bit emphasises the point, it somehow strengthens and stresses the point she is making. Another good persuasive trick used by her is to mingle fact with opinion and make it sound all like fact, in this next paragraph we see her doing just that, many of the main European zoos were founded at the beginning of the last century this is all fact and now she astutely and subtly adds her opinions on that, hand in hand with the spirit of adventure conquest and acquisition it is no coincidence that the zoo as we know it sprang up in the colonial era this makes us understand the real reasons for displaying the animals while it is still only her opinion. This affects us on whether we believe and trust the text, she gives a lot of facts but she has hidden her opinions in the form of fact among the facts, so we would tend to believe her, she uses opinions based on facts while giving facts as examples to illustrate her point. To further the readability of her article, colloquial language is used to simplify the language barrier between the grammatically correct English and her colloquialism so that it is easier to read and to digest the information, these days gawp a rhetorical question is used, so what do the zoos do? this is colloquial language with rhetorical question working at the same time. The answer has sarcasm built in, she hypes what the zoos say they do, serious scientific research total commitment to conservation vital role as educators then she dashes it all to pieces with 2 sharp points, they go to see the animals-and to be entertained. The effect of that is to drag down the zoos lofty ideals so that she can now put her argument to use with the subject now, of why we need zoos, this is divide and conqueror, she uses a linked process of arguments and then one by one she moves on to another stage and to convince us in the end to her beliefs. Another rhetorical question, Just what do people see when they look at an animal in a zoo? this time it is all in a paragraph of its own, this is so, so that we would have time to reflect on the question before she goes on to one of her main arguments. We then see the use of inclusive language, were most of us we tell us this language includes us and therefore more closer to the authors thoughts and we would believe it more as the argument appeals to us as the reader. In the next paragraph, we see emotive language been used, harmful stripped torn away reduced it to be an object to be observed, the emotive language used appeals to our heartstrings and it arouses strong feelings within us, to do something to stop the suffering.

Gender Roles in Society Essay -- Sociology Gender Sex Essays

Gender Roles in Society Suggested roles of all types set the stage for how human beings perceive their life should be. Gender roles are one of the most dangerous roles that society faces today. With all of the controversy applied to male vs. female dominance in households, and in the workplace, there seems to be an argument either way. In the essay, â€Å"Men as Success Objects†, the author Warren Farrell explains this threat of society as a whole. Farrell explains the difference of men and women growing up and how they believe their role in society to be. He justifies that it doesn’t just appear in marriage, but in the earliest stages of life. Similarly, in the essay â€Å"Roles of Sexes†, real life applications are explored in two different novels. The synthesis between these two essays proves how prevalent roles are in even the smallest part of a concept and how it is relatively an inevitable subject. Warren Farrell is a well educated man who focuses his attention on gender. In his essay â€Å"Men as Success Objects,† he writes about gender roles in male-female relationships. He begins, â€Å"for thousands of years, marriages were about economic security and survival† (Farrell 185). The key word in that statement is were. This implies the fact that marriage has changed in the last century. He relates the fact that post 1950s, marriage was more about what the male and female were getting out of the relationship rather than just the security of being married. Divorce rates grew and added to the tension of which gender held the supremacy and which role the individuals were supposed to accept. â€Å"Inequality in the workplace† covered up all of the conflicts involved with the â€Å"inequality in the homeplace†(Farrell). Farrell brings to attention all ... ...o accept. They help define male versus female. Most of the time these issues are taken lightly, and go unnoticed until someone or some group pays attention to the inequality and typical roles. It becomes interesting when roles are reversed in society to see how others react to those situations. Society seems to be getting more comfortable with female success, and less obsessed with women staying home to do housework. No matter how successful, there is always a struggle for dominance. It also seems to depend on how children are brought up as to how strongly those individuals strive to achieve their specific role. It will be interesting to see as society changes over time how the defined gender roles will continue to change as well. Whether it is the conflict of success, supremacy, or need for perfection roles will sustain time just as they have from the beginning.

Labor Supply and Demand Scenario Custom Research

Area of Employment The area of employment that will be used for this analysis is the real estate industry; more precisely, the specific job function that will be the basis for the analysis is the real estate agent.   The hypothetical shift that will shape the subsequent sections of this scenario is a high job growth rate. Why Has the Shift Occurred? The shift has occurred due to an increased demand for real estate, which has led to an increased demand for real estate agents to serve the needs of potential buyers.   It should be noted, however, that this shift has emerged in the real estate industry due to the fact that real estate presents an environment of perfect competition, whereby there are many competitors who can freely pursue opportunities in a free market setting (Mankiw, 2004). Direction of Shift in Labor Supply and Demand In a scenario that represents increased numbers of real estate agents due to additional potential buyers of real estate, there are several economic factors at work.   First, as demand for the product of real estate increases, so will the price of real estate, given a limited supply.   Likewise, the demand for agents to sell the real estate will increase, and the cost of those agents (real wages) will increase while at the same time, the supply of agents will likely decrease. This is a demonstration of the neoclassical theory of distribution (Mankiw, 2004). Effect of the Scenario on Labor Market Equilibrium The effect that this scenario will have on labor market equilibrium is that as the supply of available real estate agents decreases, the price of those agents (wages) will increase. This in turn may slow the demand for agents overall if lower priced alternatives are sought, such as less employees taking on more responsibility.   This is a classic example of equilibrium in labor demand (Mankiw, 2004). References (Mankiw N G 2004 Principles of Economics)Mankiw, N. G. (2004). Principles of Economics (3rd ed.). Chicago: Thomson South-Western.      

Dealing With Divorce Through Humor

Divorce is not funny business. Its hard to laugh when two people are fighting over money, property, and kids. However, divorce is  gaining social acceptance in many parts of the world.  Humor helps to alleviate the pain of separation, and sarcasm brings out your witty side. So, if you feel like being nasty, it is better to release your nastiness through sarcastic quotes  than by snapping at your friends and family. If you are going through a difficult divorce, you may want to lighten up. Make room for humor in your heart, however bitter you feel right now.  Find ways to vent your disappointment. Rant  out loud with friends. If you are seething with anger, let off some steam with these funny divorce quotes. A sense of humor may be your best friend during this difficult time. Divorce Quotes Lewis GrizzardInstead of getting married again, Im just going to find a woman I dont like and give her a house. Oscar WildeDivorces are made in heaven. Dave BarryToday, it is easier to get divorced in most states than to get a transmission repaired properly. Garry TrudeauIn Palm Springs, they think homelessness is caused by bad divorce lawyers. John Kenneth GalbraithThe happiest time of anyones life is just after the first divorce. Zsa Zsa GaborHe taught me housekeeping; when I divorce I keep the house. Woody AllenThe only time my wife and I had a simultaneous orgasm was when the judge signed the divorce papers. I should have known something was wrong with my first wife. When I brought her home to meet my parents, they approved of her. Mary Kay BlakelyDivorce is the psychological equivalent of a triple coronary bypass. After such a monumental assault on the heart, it takes years to amend all the habits and attitudes that led up to it.   J. B. HandelsmanJust another of our many disagreements. He wants a no-fault divorce, whereas I would prefer to have the bastard crucified. Jimmy FallonA 99-year-old man is filing for divorce from his 96-year-old wife, making them the worlds oldest divorced couple. Its got to be weird when a divorce lawyer is fighting for your kids to get custody of you.A new study found that women gain more weight after marriage, but men gain more weight after a divorce. Yeah, the divorce usually takes place after men point out that women gained more weight after marriage. Groucho MarxMarriage is the chief cause of divorce. Jean KerrBeing divorced is like being hit by a Mack truck.  If you live through it, you start looking very carefully to the right and to the left. Johnny CarsonThe difference between a divorce and a legal separation is that a legal separation gives a husband time to hide his money. Wendy LiebmanMy mother always said dont marry for money, divorce for money. Robin WilliamsAh, yes, divorce... from the Latin word meaning to rip out a mans genitals through his wallet. Helen RowlandLove, the quest; marriage, the conquest; divorce, the inquest. Dave BarryYou should be prepared for anything during divorce proceedings—even the truth. James CaanTo get over my divorce, I got a prescription to live at the Playboy Mansion for a while. Ruth GordonIn our family, we dont divorce our men—we bury them.   Mike TysonYou cant stay married in a situation where you are afraid to go to sleep in case your wife might cut your throat. Bette DavisI’d marry again if I found a man who had $15 million and would sign over half of it to me before the marriage and guarantee he’d be dead in a year. Lenny ClarkeI can’t get divorced because I’m a Catholic. Catholics don’t get divorced. They stay together through anger and hatred and festering misery, just like God intended. Mickey RooneyA lot of people have asked me how short I am. Since my last divorce, I think Im about $100,000 short. Evan EsarSome women get divorces on the grounds of incompatibility; others, on just the first two syllables. Many a woman would get a divorce if she could do it without making her husband happy. Tommy ManvilleShe cried—and the judge wiped her tears with my checkbook. Louis C.K.Divorce is always good news. I know that sounds weird, but its true because no good marriage has ever ended in divorce. That would be sad. If two people were married and they just had a great thing and then they got divorced, that would be really sad. But that has happened zero times. Chelsea PerettiMy parents divorced when I was one year old so I don’t really remember any of the details, but luckily, my mom does so she’s been really helpful. John CleeseI got off lightly. Think what I’d have had to pay Alyce if she had contributed anything to the relationship—such as children or a conversation. Russell BrandWhen youre a monk, youre not allowed to have sex with anyone. When youre married, its one person. Thats one more than a monk. Its not that different.