The Doppler Effect for Sound Waves

The Doppler effect is a means by which wave properties (specifically, frequencies) are influenced by the movement of a source or listener. The picture to the right demonstrates how a moving source would distort the waves coming from it, due to the Doppler effect (also known as Doppler shift). If youve ever been waiting at a railroad crossing and listened to the train whistle, youve probably noticed that the pitch of the whistle changes as it moves relative to your position. Similarly, the pitch of a siren change as it approaches and then passes you on the road. Calculating the Doppler Effect Consider a situation where the motion is oriented in a line between the listener L and the source S, with the direction from the listener to the source as the positive direction. The velocities vL and vS are the velocities of the listener and source relative to the wave medium (air in this case, which is considered at rest). The speed of the sound wave, v, is always considered positive. Applying these motions, and skipping all the messy derivations, we get the frequency heard by the listener (fL) in terms of the frequency of the source (fS): fL [(v vL)/(v vS)] fS If the listener is at rest, then vL 0.If the source is at rest, then vS 0.This means that if neither the source nor the listener are moving, then fL fS, which is exactly what one would expect. If the listener is moving toward the source, then vL 0, though if its moving away from the source then vL 0. Alternately, if the source is moving toward the listener the motion is in the negative direction, so vS 0, but if the source is moving away from the listener then vS 0. Doppler Effect and Other Waves The Doppler effect is fundamentally a property of the behavior of physical waves, so there is no reason to believe that it applies only to sound waves. Indeed, any sort of wave would seem to exhibit the Doppler effect. This same concept can be applied not only to light waves. This shifts the light along the electromagnetic spectrum of light (both visible light and beyond), creating a Doppler shift in light waves that is called either a redshift or blueshift, depending on whether the source and observer are moving away from each other or toward each other. In 1927, the astronomer Edwin Hubble observed the light from distant galaxies shifted in a manner that matched the predictions of the Doppler shift and was able to use that to predict the speed with which they were moving away from the Earth. It turned out that, in general, distant galaxies were moving away from the Earth more quickly than nearby galaxies. This discovery helped convince astronomers and physicists (including ​Albert Einstein) that the universe was actually expanding, instead of remaining static for all eternity, and ultimately these observations led to the development of the big bang theory.

Analysis Of The Movie Waiting For Superman - 1952 Words

Danny kinder-key Waiting for Superman 2010 Mr. Davis Guggenheim—an American film director and producer wrote and directed Waiting for â€Å"Superman†, a documentary that deals with the American education system. Guggenheim argues that they are failing more each year in producing successful students. He finds where the faults are within the public educational system. He takes the time to show us some of the faces to those numbers to make his pubic realize they are more than just numbers dropping off the charts. He wishes to not only inform, but also to inspire others to act. This essay expresses how he portrays his arguments effectively; also identifying and analyzing the strategies that Guggenheim uses to organize and develop his ideas and determine who his intended audience is. Guggenheim successfully persuades his audience, first by using the ethos appeal. He does this by opening his film by explaining that as parent, he also worries and cares for the success of his own children and is very aware of the degradation of the public education. He is also being fair-minded as he opens up about a previous film he created where he was actually supporting the idea that public schools worked. Although he held those beliefs up so highly once, he’s now changed opinion. Guggenheim sincerely expressing why this has happened saying, â€Å"Ten years later, it was time to choose a school for my own children...and then reality set in. My feelings aboutShow MoreRelatedAnalysis Of The Movie Waiting For Superman 1186 Words   |  5 Pages â€Å"Waiting for Superman† looks at a problem plaguing American schools all over the country today. This film makes it clear this problem hits hardest in the poorest communities of the country, he does make it clear thou gh that it can happen in rich communities and suburbs.. The filmmakers attack all political parties and belief systems. The movie looks at many things , the funding of schools, how supplies are distributed to schools, how teachers are picked and monitored, teachers unions, differentRead MoreMovie Analysis : Waiting For Superman 1271 Words   |  6 Pageslife gives you lemons, make lemonade: a clichà © that seems to be used oftentimes and never fails to humor some truth in it. In the television show, The Simpsons, episode: â€Å"How the Test Was Won,† directed by Lance Kramer and the documentary, Waiting for Superman, directed by Davis Guggenheim, indicates the depleted issue in our education system. Both texts argue the decline of our nation’s literacy and school merit that comes with. Ultimately, Guggeheim builds his credibility with citing reputableRead MoreAnalysis Of The Movie Waiting For Superman 935 Words   |  4 PagesWaiting for Superman is a docume ntary that scrutinized public schools primarily located in inner-city areas. The documentary provided criticism towards educational reforms and the process of seeking alternative private or institutionalized education (i.e. charter schools). The film showcased the testimonies of five students and their desires to escape the failing public schools in the area. Waiting for Superman is metaphorically titled to suggest that a false sense of hope is given to studentsRead MoreAnalysis Of The Movie Waiting For Superman 902 Words   |  4 PagesWaiting for â€Å"Superman† is a documentary that focuses on five children-Anthony, Bianca, Emily, Francisco, and Daisy- who are looking for a better outcome for their education. The film is set up to follow different stories to explain how the school system works and the different ways that each school district functions. In detail, it unravels the struggle of the American school system and how the roles of charter schools has increased. It shows the five different charter schools that each child wantsRead MoreMovie Analysis : Waiting For Superman2121 Words   |  9 PagesAfter watching both â€Å"Waiting for Superman† at home and â€Å"Race to Nowhere† in class, a lot of conclusions can be made from both incredibly made documentaries. Both films offered their audience the oppor tunity to be informed about the problems and issues in contemporary American education, both clearly with two completely different points of view. â€Å"Waiting for Superman† and â€Å"Race to Nowhere† were both created in 2010, and here and now in 2015, major issues in the United States surrounding educationRead MoreVsdgvfyhb2024 Words   |  9 PagesWriter’s Reflection ​When I heard the assignment for Inquiry Two, I was quite excited. I had heard of â€Å"Waiting For Superman,† but had never really had the chance to watch it. The topic of it is something that I am extremely passionate about and was eager to learn more about. So I happily watched the documentary and quickly whipped out a first draft (rough rough draft) without even really having to think about it- the words just poured out. However, when writing my real rough draft, I tried to focusRead MoreExamples Of Education In Waiting For Superman1242 Words   |  5 PagesA proper education is one of the most important things in a childs life. In the powerful documentary, Waiting for Superman, directed by Davis Guggenheim, the audience is given an insight on charter, public, and private/ boarding schools. While the underlying tones of the film are leaning towards the positives of these prestigious schools, the main principle is how important an education is, and the steps the cou ntry is taking to improve it. Throughout the film, a strong pull of emotion is presentedRead MoreA System of Failure Essay2247 Words   |  9 Pageswriter Jerry Siegel and artist Joe Shuster first appeared in Action Comics. Deemed Superman, the mythical hero was dedicated to fight for social justice and overthrow tyranny. Soon after, his iconic flashy red cape and tight blue bodysuit graced the shelves of comic shops as he flew straight into the hearts and minds of fellow Americans faster than a speeding bullet. In spite of being a very foreign immigrant, Superman has long been portrayed as a loyal patriot fighting for truth, justice and the AmericanRead MoreThe History of Inequality in the United States1111 Words   |  4 Pagestheir parents because of immobility, how far they advance in their positions will be determined by the system of meritocracy (Manza, Arum, Haney, 2013). If a class analysis is conducted, it will probably be easy to see that the workers would be members of the lower class. Three issues that were not included in â€Å"Waiting For Superman† are the issues of inequality based on race, income, and wealth, all of which can be tied back to each other. The issue of race can be seen by the fact that many of theRead MoreSailor Moon2795 Words   |  12 Pagesbasing my analysis off of the Japanese version of the series. I have long since felt that the English version does a disservice to its fans by making the characters immature, censoring homosexuality, and stereotyping what it is to be a teenager. I will also plead artistic license on the spelling and order of the names. So, without further adieu, the Sailor Soldiers. Sailor Moon/Usagi Tsukino: Our heroine. Our very flawed heroine. And how refreshing that is! Instead of a very boring Superman who could

Core Concepts in Cultural Competence Free Essays

Core Concepts in Cultural Competence Key Concepts (printable) |Cultural Competence | | | | |Definition: |Cultural Competence is a set of values, behaviors, attitudes and practices within a system, organization, program or among | | |individuals that enables them to work effectively across cultures. Cultural competence refers to the ability to honor and respect | | |the beliefs, language, interpersonal styles and behaviors or children and families receiving medical care, as well as those of the | | |staff who are providing such care. Cultural competence is a dynamic, ongoing developmental process that requires a long term | | |commitment and is achieved over time. We will write a custom essay sample on Core Concepts in Cultural Competence or any similar topic only for you Order Now | | | |Examples: |Examine Cultural Competence in the following examples: | | |Example 1: Maria Hernandez arrives late for her appointment, and explains that she spent a few hours with her elderly aunt on the | | |way to her appointment. The nurse, Ella, greets Maria warmly and comments on Maria’s devotion to her family. Ella understands that | | |in the Hispanic community, caring for family often comes before an individual need such as an appointment. | | |Example 2: When Gina, the social worker, enters an examining room she is already alert to the fact that the family she is meeting | | |may have views about healthcare that are different than her own. She inquires about the family’s beliefs, drawing on her knowledge | | |of the culture, but primarily interested in what the family tells her about their unique views. | | |Example 3: Fred, the pharmacist, becomes frustrated with an Asian family who has been using herbal remedies. With great authority, | | |he tells them that they are â€Å"doing the wrong thing. † Fred is not behaving in a culturally competent manner. | | | |Application: |When meeting a patient or family for the first time, be aware that their beliefs and practices may differ from your own. Try to | | |learn as much as you can about the family’s life and how they view the world. | | | | | | |Culture | | | | |Definition: |Culture is defined as the sum of one’s beliefs, rituals, customs and practices that guide thinking, decisions and actions in a | | |patterned way. They are learned throughout a lifetime and passed on through generations. | | | | |Examples: |Examine Culture in the following examples: | | |Example 1: Among some cultures in India, the occasion on which a child first eats solid foods is celebrated with great ceremony. | |Example 2: â€Å"Family† is defined differently in different cultures: in some cultures, â€Å"family† means primarily parents and children. | | |In other cultures, â€Å"family includes a large number of relatives, loosely related. | | |Example 3: Disabilities are viewed differently in different cultures. In some cultures, people with disabilities are hidden, in | | |others they are believed to be endowed with special gifts. In some cultures, people with disabilities are encouraged to become | | |independent and live independently; in others, it is the family’s wish and responsibility to care for the disabled person. | | | | |Application: |Because of differences between cultures, patients’ behaviors and beliefs may be different from one’s own. | | | | | | |Explanatory Model | | | | |Definition: |The Explanatory Model is the belief system that people from a given culture have about what has caused their illness and what the | | |illness does to them. Patients’ beliefs about what will help cure them depend on their explanatory model. | | | | |Examples: |Examine the Explanatory Model in the following examples: | | |Example 1: A Romani patient may believe that bad luck, bad behavior or contamination has caused his illness. | | |Example 2: An Hispanic mother may believe that her child has Mal d’ojo, or has been cursed with the â€Å"evil eye. | | |Example 3: An Asian patient may believe she is having a difficult birth because of an imbalance between hot and cold in her body. As| | |pregnancy is a â€Å"cold† condition she may request a drink of hot water, for balance. | | | | |Application: |In order to learn about your patients’ explanatory model, you may want to ask something like: â€Å"I know different people have very | | |different ways of understanding illness†¦ Please help me understand how you see things. † | | | | | | | |Health Beliefs | | | | |Definition: |Patients’ beliefs about their health. Health eliefs include cultural beliefs about what causes illness, what will help illness and | | |who is best prepared to help the illness. The â€Å"Health Belief Model† as defined by Becker, postulates that patients weigh more | | |general beliefs such as whether or not they really believe they are ill and whether they believe the treatment offered by the | | |physician will offer relief, against potential disadvantages of the treatment. | | | |Examples: |Examine Health Beliefs in the following examples: | | |Example 1: A mother’s health belief may involve the idea that a particular amulet will protect her daughter. | | |Example 2: Some Native American tribes health beliefs include the idea that taking a photograph of a person will rob the person of | | |his or her soul. | |Example 3: A mother may believe that her daugh ter doesn’t have asthma, but just coughs occasionally and that the inhaled steroids | | |are dangerous for her daughter. She may therefore decide that the potential risks of the medication outweigh the benefits. | | | | |Application: |A patient whose health belief is that his illness is a punishment for past sins may not believe that biomedical care will help him. | |He may believe that he will only get better when he atones for his sins. | | | | | | | |Social Factors | | | | |Definition: |Social Factors refer to environmental factors which affect how the family functions. These include (but are not limited to) | | |financial factors (such as socioeconomic status or type of – or lack of – insurance), logistical factors (such as transportation or | | |juggling many demands), housing, childcare and accessible health care. Social factors sometimes also include family relationships or| | |family dynamics which affect a child or family member. This often, in turn, influences emotional factors. | | | |Examples: |Some examples of Social Factors are: | | |Example 1: Some families do not buy medications that they need because they do not have insurance or cannot afford the co-pay. | | |Example 2: A child may come to clinic dirty, not because the mother doesn’t care about cleanliness but because the water has been | | |off and the landlord refuses to return her phone calls. | |Example 3: A child’s divorced parents may be angry at each other, causing tension in the family and interfering with the consistency| | |of his care as he moves between their homes. | | | | |Application: |It is always important to learn as much as you can about the social factors that affect a family. This will help you understand the | | |choices they make and the constraints they are under. | | | | | | |Acculturation | | | | |Definition: |The adoption of the behavior patterns of the dominant culture; the process of assimilating new ideas into an existing cognitive | | |structure. Acculturation is the process of acquiring a second culture. Assimilation is the process of replacing one’s first culture | | |with a second culture. | | | | |Examples: |Some examples of Acculturation are: | | |Example 1: A first generation Italian who lives in an Italian enclave in he United States may continue to speak just Italian and to| | |follow the norms and mores of his Italian origins. This person will not have become highly acculturated to American culture. | | |Example 2: The granddaughter of a Chinese immigrant has gone to American schools and will now attend an American college. She spends| | |time primarily with her American friends, dresses as they do and shares their values and interests. She has become highly | | |acculturated into American culture. | | | | |Application: |The degree to which a patient holds the health beliefs of his country-of-origin will depend in part on how acculturated he has | | |become to American culture. | How to cite Core Concepts in Cultural Competence, Papers