The Coriolis Force An Overview

The Coriolis force describes the ...of all free-moving objects, including wind, to deflect to the right of their path of motion in the Northern Hemisphere (and to the left in the Southern Hemisphere).  Because the Coriolis effect is an  apparent  motion (dependent on the position of the observer), it isnt the easiest thing to visualize the effect on  planetary scale  winds.  Through this tutorial, you will gain an understanding of the reason winds are deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. The History To begin, the Coriolis effect was named after Gaspard Gustave de Coriolis who first described the phenomenon in 1835. Winds blow as a result of a difference in pressure. This is known as the pressure gradient force. Think of it this way: If you squeeze a balloon at one end, the air automatically follows the path of least resistance and works towards an area of lower pressure. Release your grip and the air flows back to the area you (previously) squeezed. Air works in much the same way. In the atmosphere, high and low pressure centers mimic the squeezing done by your hands in the balloon example. The greater the difference between two areas of pressure, the higher the wind speed. Coriolis Make Veer to the Right Now, let’s imagine you are far away from the earth and you are observing a storm moving towards an area. Since you are not connected to the ground in any way, you are observing the rotation of the earth as an outsider. You see everything moving as a system as the earth travels around at a speed of approximately 1070 mph (1670 km/hr) at the equator. You would notice no change in the direction of the storm. The storm would appear to travel in a straight line. However, on the ground, you are traveling at the same speed as the planet, and you are going to see the storm from another perspective. This is due largely to the fact that the rotational speed of the earth depends on your latitude. To find the rotational speed where you live, take the cosine of your latitude, and multiply it by the speed at the equator, or go to the Ask an Astrophysicist site for a more detailed explanation. For our purposes, you basically need to know that objects on the equator travel faster and farther in a day than objects at higher or lower latitudes. Now, imagine that you are hovering exactly over the North Pole in space. The rotation of the earth, as seen from the vantage point of the North Pole, is counterclockwise. If you were to throw a ball to an observer at a latitude of about 60 degrees North on a non-rotating earth, the ball would travel in a straight line to be caught by a friend. However, since the earth is rotating underneath you, the ball you throw would miss your target because the earth is rotating your friend away from you! Keep in mind, the ball is STILL traveling in a straight line - but the force of rotation makes it appear that the ball is being deflected to the right. Coriolis Southern Hemisphere The opposite is true in the Southern Hemisphere. Imagine standing at the South Pole and seeing the rotation of the earth. The earth would appear to rotate in a clockwise direction. If you don’t believe it, try taking a ball and spinning it on a string. Attach a small ball to a string of about 2 feet in length.Spin the ball counterclockwise above your head and look up.Although you are spinning the ball counterclockwise and DID NOT change direction, by looking up at the ball it appears to be going clockwise from the center point!Repeat the process by looking down at the ball. Notice the change? In fact, spin direction does not change, but it appears to have changed. In the southern Hemisphere, the observer throwing a ball to a friend would see the ball being deflected to the left. Again, remember that the ball is in fact traveling in a straight line. If we use the same example again, imagine now that your friend has moved farther away. Since the earth is roughly spherical, the equatorial region must travel a greater distance in the same 24 hour period than an area of higher latitude. The speed, then, of the equatorial region is greater. A number of weather events owe their movement to the Coriolis force, including: the counter-clockwise spin of low pressure areas (in the Northern Hemisphere)   Updated by Tiffany Means

Essay about Cultural Studies 1st Exam - 1573 Words

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The idea of mixing and reconfiguring of elements from different cultural traditions is acknowledged and even celebrated. _____________________________24. Individuals who people believed have the power to contact powerful cosmic beings directly on behalf of others, sometimes traveling to the cosmic realm to communicate with them. _____________________________25. The beliefs and practices about language that are linked to struggles between social groups with different interests and that are regularly revealed in what people say and how they say it. Part Two: Multiple Choices ___1. Anthropologists who study the factors that contribute to human disease or illness as well as the ways in which human groups respond to them. a. Biological Anthropologists b. Medical Anthropologists c. Cultural Anthropologists d.Show MoreRelatedEssay about Distant Education: Online Learning1565 Words   |  7 Pagesespecially for the high school students. 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The Search For Self Identity free essay sample

During adolescence and sometimes even to late adulthood, people are searching for their identity, a relatively clear and stable sense of who one is and what one stands for (Weiten Lloyd, 2006). Identity formation is the central task of adolescence, according to Erik Eriksons’s theory of psychosocial development (Bernstein, 2008). Erikson believed that identity emerges from an identity crisis, which is the phase when one attempts to develop a self-image as a unique person by using knowledge from childhood. Based off of Erikson’s work, James Marcia formed the four identity statuses of identity development: identity diffusion, identity foreclosure, identity moratorium, and identity achievement (Oswalt). In J. D. Salinger’s The Catcher in the Rye, the protagonist Holden Caulfield struggles as he attempts to find his identity. Holden bests reflects Marcia’s theory of identity development. Marcia’s theory states that there are four different statuses of identity development but people do not necessarily go through all four in any specific order or achieve all four statuses; each status represents the stage of the adolescent’s progress in regards of his/her identity development. We will write a custom essay sample on The Search For Self Identity or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Identity diffusion is when there is an absence of struggle for identity. The youth shows no interest/concern in exploring or committing to a specific identity. He/she have not shown any regards of his/her identity and have yet to establish any life goals. Adolescents in the foreclosure status do not question the values and beliefs they have been taught and obtain their identity by accepting the beliefs and values taught by their family, community, and culture. In other words, they accept the identity assigned to them. In this status, adolescents show high degree of commitment but a low degree of exploration. In the moratorium status, youths display a high degree of exploration but a low degree of commitment. They are questioning and experimenting with different values, beliefs, and goals. However, they have not made any commitments about to any beliefs and values or chosen any principles to live by. The last identity status is identity achievement where there are both a high degree of exploration and commitment. This status is achieved by active exploration and a strong commitment to a specific set of values, beliefs, and life goals. At this status, the youth has decided what values and goals are important to him/her, is able to prioritize what is important to him/her, and have already thought through all the possibilities of who he/she want to be. Holden Caulfield holds the status of identity diffusion, where he has no interest in exploring who he is or committing to anything. His very name, Hold-On-Caul-field is play on word. Caul is a membrane that covers the head of a fetus during birth, so his name symbolizes Holden’s refusal to grow up; he is desperately holding onto â€Å"innocence† and childhood. Holden shows his lack of ability to commit from his records of constant expulsion from various prestigious boarding schools. He is extremely harsh and judgmental on other people, calling them â€Å"phony† or fake however, this is just Holden own insecurities about himself. He doesn’t know who he is or what he wants which causes him to be extremely distraught and judgmental about others. Even his younger sister, Phoebe accuses him â€Å"You don’t like anything that’s happening† (Salinger, p169). Phoebe understands that growing up is a necessary process and despite being six years younger than Holden, she is angry with his refusal to grow up. When Holden visits Mr. Antolini, one of Holden’s former teachers, the teacher tells him â€Å" once you have a fair idea where you want to go, your first move will be to apply yourself in school† (p189). Mr. Antolini, too recognizes Holden’s inability to commit himself which leads to Holden’s unsuccessfulness. Erikson believed that people followed a specific path while developing their identity: trust vs. mistrust (infancy), autonomy vs. shame (early childhood), initiatives vs. guilt (mid childhood), competence vs. inferiority (elementary school), identity vs. role confusion (adolescence), intimacy vs.  isolation (young adulthood), generativity vs. stagnation (mid adulthood), integrity vs. despair (late adulthood). However, Erikson’s theory of development does not take into account of any trauma or unusual circumstances that may occur hence why Holden does not follow Erikson’s theory. During Holden’s late childhood, his younger brother passed away, leaving a deep scar on Holden. Unable to cope with the lost of his brother, Holden is stuck in the identity diffusion status and will be unable to achieve any other status until he is able to let go of his brother.