Plastic Doll

In: Science

Submitted By nanetteperez
Words 647
Pages 3
Plastic Doll 1. What is the difference between energy and power? What is a unit of power? How does speed relate to power?

.energy is the ability of doing work while power is the rate at whch work is done unit of power = Watts = 1J/s power = force * velocity 2. Explain how a sound is actually a form of energy? In what medium do sound waves travel?
The longitudinal waves generated by sound will create a wave that transfers at some rate , corresponds to transfer of energy.
They travel in all states of matter, but speed will be different in different matters. 3. Give an example of change of energy from potential to kinetic; from kinetic to potential.
The water falling from the mountains stores kinetic energy.....when falls its potential energy..... and the danamo kept under it gives us ELECTRICITY.... 4. What is a trophic level? Give some examples. How much energy is lost at each trophic level?
The trophic level is the position that an organism occupies in a food chain -what it eats, and what eats it. In an ecosystem there is almost always some foundation species that directly harvests energy from the sun, for example, grass. Next are herbivores (primary consumers) that eat the grass, such as the rabbit. Next are carnivores (secondary consumers) that eat the rabbit, such as a bobcat. There can be several intermediate links, which means that there can be another layer of predators on top, such as mountain lions, which sometimes eat bobcats.
The larger amount of energy is lost at each trophic level. There is only 10% of energy that is passed on to the next level. This therefore means that 90% of the energy is lost on each level.

5. If you eat 600 calories per day (roughly one dessert) below your energy needs, how long would it take to lose 10 pounds? How long would you have to walk (assuming 80 calories burned per mile walked) to lose…...

Similar Documents

Barbie Doll

...In the poem “Barbie Doll” by Marge Piercy, she illustrates the effect that society has on the expectations of women. This expectation is that women, like the girl described in the poem, should be perfect. She should know how to cook and clean, but most importantly she should be attractive according to the impossible stereotypes of womanly beauty. Many women in today’s society are being compared to the unrealistic physical looks and life of the Barbie doll. Through the past many years, the Barbie doll has gone from a popular toy to a role model for actual women in today’s society. The extremes to which women take the Barbie doll as a role model are implicit in this poem. The opening line of the poem says, “This girlchild was born as usual,” which suggests that as soon as a female child is born, society expects her to learn the role she will play once she hits puberty. Therefore, showing the readers why little girls are given dolls at a young age to illustrate how they should act and appear according to society. Once girls learn the roles they will soon have to play in their own lives, “the magic of puberty,” hits and girls immediately begin applying these ideals to their own lives. As if the attempt of girls trying to conform to the Barbie doll image isn’t enough, they also have other people in society telling them that they’re not perfect. “You have a great big nose and fat legs,” says a classmate to the girl. This type of pressure from peers and society can slowly but......

Words: 701 - Pages: 3


...put into action and reproducible in other communities. Bilgin spent two years toiling away on her project to develop a bioplastic from discarded banana peels, enduring 10 failed trials of plastics that weren’t strong enough or that decayed rapidly. She was undaunted. As she put it in her project description: “Even Thomas Edison said, ‘I have not failed. I have just found 10,000 ways that won’t work.’” Finally, in her last two trials, she made plastics with the features she sought, and it did not decay. We admire her persistence, which will be help her to take advantage of another aspect of her Science in Action prize—a year’s worth of mentoring to help further her work. I like to think, too, that Edison, who used to stop by the Scientific American offices in New York City to demonstrate his latest inventions, would have approved. The ingredients to make Bilgin’s plastic are relatively benign. As she wrote in her entry materials, “it is possible to say that one could do it at home.” In her research, she learned that starch and cellulose are used elsewhere in the bioplastic industry (such as from the skin of mangoes) and made the leap that banana peels might be suitable feedstock sources as well. She hopes that the use of the bioplastic could replace some of the petroleum-based plastics in use today for such applications as insulation for electric cables and for cosmetic prostheses. The health application is perhaps no surprise to those who know Bilgin; she hopes to......

Words: 965 - Pages: 4


...As everyone knows the humble plastic bag has become an integral part of our lives. In fact the plastic bag has become so common that we hardly notice their presence. Yet if you look around you will notice that we are all in a swamp of plastic bags! They are everywhere. We use them to pack clothes, shoes, pens, tools, video games and even fruits and vegetables. At the super market they are soft yet strong packing medium. They are light weight, high strength and very flexible and come at a low cost. All of this might sound wonderful. But do you want to be a person who contributes to one of the latest and difficult of the environmental problems. The plastic bag is an agent of air pollution, cancer and skin disease. People who use these bags have made this an environmental menace which has made many of world's clean and glimmering metropolises a pile of garbage! Did you know they are a slow poison in our daily life? When you use plastic bag do you know how they are made? Many of the plastic bags at the super market are made through recycled plastic; this means the old plastic is burnt at high temperatures and melted down. For this process a large number of hazardous chemicals are used which makes them a severe health hazard. When you use a plastic bag you could be responsible for giving people who are close to you cancer, because when plastic bags and other plastic materials are burnt below 7,000 degrees they produce gasses which can lead to skin disease and some forms of......

Words: 355 - Pages: 2


...Assignment #4 Plastics Ana Peterson Welcome to Assignment 4. Today’s assignment is about plastics, specifically about using plastics to create more environmentally friendly forms of packaging, but first…. Petersons’ Short Takes Don’t be fooled by environmentalist who post videos on YouTube designed to invoke an emotion so you will form an opinion that agrees with their agenda and at the same time offering no solution to the problem. And I quote “40 years later the future is here, and with respect to plastics it’s not so great.” Environmentalist would have you believe that plastic is the great spawn of Satan and the only solution is to completely eradicate it or tax anyone that profits from it until they can no longer afford to use it. “Those who profit from plastics are trying to dispute the harm that plastics cause.” Haven’t we all profited from plastics? Hasn’t the entire human race profited from plastics? Isn’t the button on your shirt plastic? How about the microphone you are speaking into? Isn’t the camera you are using to make your video made out of plastic? I would argue that plastic has helped the environment more than it has harmed it. It would be an easy argument to make because speaking in generalities is pointless. Saying plastic is the problem takes the human factor out of it and invokes a negative emotion in people towards plastic.......

Words: 1090 - Pages: 5


...Ultrasonics - PLASTICS please click for enlargement Variations of Joint Designs or Energy Directors For the design of plastic parts for assembly with ultrasonic energy, many recommendations exist to save time, energy and tooling modifications. The first step for a designer is to determine the most suitable joining technique. The following variations are possible: Ultrasonic Welding Ultrasonic Swaging, Staking, Spot-Welding Ultrasonic Insertion Ultrasonic Welding The molten material builds at the contact area of the energy director between the to be welded parts. The ultrasonic waves are transferred through the part to the joint area. Common "standard" joint designs include: Basic 90 Degree Energy Director 90 Degree Energy Director Step Joint 90 Degree Energy Director Tongue & Groove Herrmann Ultrasonics Mash Joint Double V-Point Tongue & Groove The recommended process examples listed above can be varied with inserted gaskets or in-molded 2K injection molded gaskets. Ultrasonic Swaging, Staking, Spot-Welding please click for enlargement In addition to conventional types of joint design for bonding injection molded plastic parts, ultrasonic welding can be used in a verity of forms to accomplish a mechanical bond when only one part is of thermoplastic material. Common applications include: Swaging, for deforming or bending an area of a plastic piece to trap the other part (of different plastic......

Words: 360 - Pages: 2

The Doll in a Doll House

...Essay 01 May 2011 The Doll in A Doll House The play "A Doll House" was written by Henrik Ibsen in 1879. In the nineteenth century, women's rights were hardly restricted. The role of the woman was to stay at home and take care about the children and her husband, while the male figure in the home acted as the dominating role. The man made almost all decisions for the family. Nora Helmer is the woman of this period and is portrayed as a victim of her environment, society and male dominance. Throughout her entire life, Nora has been emotionally controlled and treated like a doll by both male characters in her life, her father and her husband. She has believed them without any questions because she is afraid to offend them, "When I lived at home with Papa, he told me all his opinions, so I had the same ones too; or if they were different I hid them, since he wouldn't have cared for that" (1213). Her father shaped her life, her opinions and her thoughts. He played with his "doll-child," spoiled and treated her like a toy and not like an individual (1213). When Nora married Torvald Helmer, she simply passed from her father's hands into her husband's hands with no changes. Nora says: " ...our home's been nothing but a playpen. I've been your doll-wife here, just as at home I was Papa's doll-child" (1213). Torvald takes Nora's father role and treats Nora as a child, controlling everything from her movements to her thoughts. He dresses up his "doll-wife", teaches how......

Words: 691 - Pages: 3

Dolls House

..."The Doll House" by Henrik Ibsen Eng/125 University of Phoenix In Dollhouse, the husband Torvald treated Nora as a child with no mind and intelligence. His pet names for her in the beginning demonstrates how he didn’t not treat her as his equal. His lack of accepting her as an equal was also demonstrated in his ability to see that Nora was a smart woman and could see and do things for her. Ibsen used many strategies to get this point across. In one of his strategies he takes a common housewife and made her secretly intelligent he uses metaphors and irony. In applying that Nora, was treated like a doll in her perfect Dollhouse was really stating that Nora was treated like a doll in her husband’s house. For example Torvalds used pet names for his wife giving her the appearance of a doll. In using irony Ibsen strategy was to state that what goes around comes around. For example the Irony of Krogstad and his forging of documents and that of Nora forging documents and the reality that both might lose their jobs, his being at the bank and hers being a mother and wife. The devices that Ibsen uses is that of the conventions of a marriage in the 1800’s, and the relationship of husband and wife. Women of this time were depended on their husbands. Most wives did not work, but instead stayed home with the children. Most women were not considered equal to the men of the family. And finally most women were considered simply-minded and lack schooling and understand the way the...

Words: 654 - Pages: 3


...Ban Plastic! Reduce, Reuse and Recycle, the three R’s plays a significant role in protection of the environment. Plastics add to litter and landfills. My opinion is to eliminate the plastic bag because it contaminates the water, badly affects the human health and destroys the environment. First, without water no one sustains for long. Plastic bag plays significant role in contamination of water bodies such as ocean, sea, lakes and rivers. For example, 90% of industrial wastes are dumped into water every year. Plastic stands at the top list of industrial wastes. In addition to that plastic bag act as a carrier of food waste as well as electronic waste to the water. Eventually end up in destroying the aquatic life system. Second, large disposal of plastics lead to create various disease which poses serious threat to the human health. For instance, a recent study conducted by Cathy Cirko, President of Canadian Plastics Industry Association revealed that reused plastic bags even showed higher levels of bacteria and toxins. Therefore the foods we carry from different stores in these bags are exposed to contamination. Moreover, a disease pop up and distracts the health of a normal person. Landfills, considered as the storage place of plastics named the critics for development of crucial diseases. Finally, plastic bags destroy the environment by making it as its dumb yard. Recycling of plastic bags increases the pollution. Air and water which are the functional part of a living......

Words: 338 - Pages: 2


...BLOW MOLDING Introduction Blow molding is defined as a plastic process whereby a thermoplastic material is heated to its forming temperature, which is below that of the plastic materials being used; at its melting point it is made to form a hollow tube called a parison or preform. This heated homogeneous plastic material is then placed between two female molds that are cooled through some medium. The two female molds close on the heated parison or preform and a gas, usually air, enters via an open end of the parison via a blow pin or needle; the gas is blown into the closed female mold halves, taking the shape of the internal female closed mold, allow to cool, and is then sent out through an exhaust. The two female molds are then separated and the cooled, shaped hollow part is then ejected or allowed to drop out for the cycle to repeat. In the first attempt over 100 years ago, to blow-mold hollow objects, two sheets of cellulose nitrate were clamped between two female mold halves. Steam injected between the sheets softened the material, sealed the edges, and expanded the heated sheets to form the inside shape of the two female mold halves. The high flammability of cellulose nitrate, however, limited the usefulness of this technique. In the early 1930s, more suitable materials, such as cellulose acetate and polystyrene (PS), were developed; these led to the introduction, by Plax Corp. and Owens-Illinois, of automated equipment based on glass-blowing......

Words: 296 - Pages: 2

Love Doll

...Love Doll: A fable Love Doll is a fable written by Joe R. Lansdale in 1991. It is a short story about a man, who buys a plastic love doll, because, as he says in the first line of the story, wants to fuck something that he doesn’t have to talk to. He names her Madge. The story follows him and Madge, and how their relationship develops. What at first started as a toy for him, soon becomes a girlfriend who perfectly soothes his needs; she cooks for him, she fuck him and she keeps the house clean. It is common for the fable genre, to give a non-human creature, qualities that are human, such as verbal communication. However, the perfect girlfriend is an illusion, as we follow the personal development of Madge. After a while, Madge stops acting like the perfect girlfriend; she won’t fuck him as often anymore and she doesn’t clean the house or make dinner as well as she used to. She keeps on talking about starting school so she can earn some extra money, even though his salary is enough to feed them both. Madge starts school even though he’s not happy about it, and she goes to these business parties and begin talking about, how a women needs to make her own way through life. She’s gotten herself a strong and confident personality, and she begins to spend more time with a guy from one of the many business parties, he wears a three piece blue suit, and it makes the main character doubt his own worth and manliness. At one point when the man is so hollowed by his current situation...

Words: 842 - Pages: 4


...types of plastics can be recycled by most municipal governments. The fraction that does get recycled still requires a lot of energy and water which just isn’t a good proposition when it comes to single-use items. Plastic garbage that ends up in landfills and oceans take hundreds of years to degrade, and there’s increasing concern about the toxins they release into the environment. But in our modern lives, plastic surrounds us and cutting it out can seem daunting. Below are some super easy ways to get started. Bring your own shopping bag Stop buying bottled water Choose cardboard over plastic bottles and bags Say no to straw Re-think your food storage Shop in bulk    Stop using plastic straws, even in restaurants. If a straw is a must, purchase a reusable stainless steel or glass straw Use a reusable produce bag. A single plastic bag can take 1,000 years to degrade. Purchase or make your own reusable produce bag and be sure to wash them often!  Give up gum. Gum is made of a synthetic rubber, aka plastic.  Buy boxes instead of bottles. Often, products like laundry detergent come in cardboard which is more easily recycled than plastic. Purchase food, like cereal, pasta, and rice from bulk bins and fill a reusable bag or container. You save money and unnecessary packaging.  Reuse containers for storing leftovers or shopping in bulk. Use a reusable bottle or mug for your beverages, even when ordering from a to-go shop .  Use matches instead of disposable plastic......

Words: 1100 - Pages: 5

Barbie Doll

...Barbie Doll. Perhaps the real mark of "Barbie Doll's" welcome has been the numerous times it has been reprinted and analysed. Appearing in 1973, at the heart of feminism's second wave, "Barbie Doll" embodied the rage many women felt at being sexually objectified and treated as second-class citizens. The poem remains popular in large parts because it continues to represent women's experience. When you read the title of this poem, automatically you get a sense of something that is not real, a typical stereotype. This stereotype is seen through modern life today, through the media, celebrities, peer groups, or the obvious child’s toy. “Barbie Doll” symbolically describes the inherently destructive nature of patriarchy. A system of social organization in which the “male” is the ruling principle, patriarchy demands women’s obedience to men. Historically, this obedience has been externally manifest through law, for example, until the twentieth century women had been denied voting privileges in the United States. But patriarchy also exhibits its power through the shaping of mind and self-image. A “good” woman is one who conforms to patriarchal expectations: she is feminine, domestic, and will be a stereotypical housewife and leave the men to be the “breadwinner”. The “Barbie Doll” is known as “Satan’s plastic sister”. The intention of the doll was perfection, and when little girls are brought up playing with “Barbie & Ken” they expect reality to be very similar in later life,......

Words: 482 - Pages: 2

Teens, Plastic Surgery or Not!

...Teens, Plastic Surgery or Not! Candy G BCOM/275 March 24, 2012 Teens, Plastic Surgery or Not! Although, many teenagers believe they will be more confident after plastic surgery to fix imperfections, teenagers should not have plastic (cosmetic) surgery. Cosmetic surgery can be dangerous, it will not improve teenagers self esteem, and most adolescents are not finished growing physically, mentally or emotionally to make the life-changing decision for these elective surgery procedures. Plastic surgery, teenagers should not undergo these procedures. Nose jobs, breast implants, liposuction, injections, plastic surgery, for teens? (Ali & Lam, 2008, p. 1, para. 1). Plastic surgery, or cosmetic surgery, the more politically correct terminology, can have several dangerous side effects ranging from infections, permanent scaring, botched procedures or, death. These young adults should not be making decisions to under go an elective procedure that they may regret later in their lives. Many teens lack self esteem and are self conscious because of a dislike of a body part or perceived imperfection, such as small breasts, large thighs or, not possessing that Barbie doll figure. Magazines have convinced teens that to be accepted by their peers they need to have a perfect body; society has also glamorized cosmetic surgery as an acceptable way of achieving......

Words: 423 - Pages: 2

Doll House

...reliable. Nora’s false reality is partially created because she never forms an opinion of her own. Nora is always afraid of having an opinion because it will disrupt or upset her husband. Nora’s life as an adult is stunted because she isn’t her own person. Nora states that “when I was at home with papa, he told me his opinion about everything, and so I had the same opinions; and if I differed from him I concealed the fact, because he would not have liked it” (III.141) and that “I was simply transferred from papa’s hands into yours. You arranged everything according to your own taste, and so I got the same tastes as your else I pretended to” (III. 142). Nora is a woman made to be a doll, and she plays the role with lies and misdeeds. Nora again demonstrates the lack of opinion. Nora’s life as a deceptive doll is further showcased by the dangerous decisions she makes. Nora takes out a fraudulent loan against her father’s name because she wants something and cannot have it. Nora realizes the burden her actions can put against her father’s name and she realizes the legal action that can result from fraud. Krogstad, Nora’s lender states “but did it never occur to you that you were committing a fraud on me?” (II.52). Nora replies that “I couldn’t take that into account; I didn’t trouble myself about you at all” (II.52). Again, when Nora is presented with an opportunity to make a poor choice that can result in dangerous consequences; she does so with relative ease. Upon the......

Words: 810 - Pages: 4

Barbie Doll

...her nose and her legs/ and offered them up.” This quote from “Barbie Doll”, by Marge Piercy, refers to a young girl who wishes to change her character and her appearance in order to live up to society’s expectations. In fact, instead of being complimented or admired for whom she truly is, people would rather criticize and condemn her for whom she isn’t. As a result of endlessly trying to alter her portrait, the “girlchild” eventually “wore herself out”. This poem suggests that unrealistic societal demands are destructive for a woman’s self-esteem and well-being. When comparing oneself to an idealistic notion of female beauty and behaviour, one can only expect to feel demoralized, discouraged and devalued. Indeed, "Barbie Doll," the title of the poem, symbolizes society’s view of a perfect woman; the way society expects every woman to be. In fact, by using “Barbie Doll” as the title to her poem, Marge Piercy wants the reader to compare and contrast the adolescent’s appearance to that of a Barbie doll. Stereotypically, Mattel’s Barbie dolls have tall, thin yet curvy bodies, with symmetrical, perfect facial features, blonde hair and blue eyes. This, in turn, leads to the protagonist’s void of self-confidence. Additionally, living up to such standards - all the while being a housewife who must clean the house, raise the children and please her husband - is very demanding on the female gender. Moreover, the doll is symbolic of the ways that women themselves have been plasticized......

Words: 7896 - Pages: 32