Inca Empire Demise essays

Inca Empire Demise essays At its height, the Inca empire stretched from modern day Colombia to central Chile, and had about nine to ten million inhabitants, yet in 1532 Francisco Pizarro and a meager 62 horsemen and 102 foot soldiers conquered the empire. Pizarro was able to conquer the Incas not only because of his cunning and ruthlessness, but also because their kingdom was in disarray, therefore, I will discuss what I believe are the three main reasons why the empire fell, and none of them will have anything to do with Francisco Pizarro. My first explanation for the demise of the Incas is their rapid and recent expansion they had gone through only a few decades before Pizarro arrived. Circa 1438 AD Inca Yupanqui (Pachacutec) defeated the Chancas and expanded his empire out of the Cuzco valley. Around 1463 AD, while Inca Yupanqui was busy organizing his conquests and remaking Cuzco, the capital of his empire, his son, Topa Inca, was allowed to take control of the Inca army and continue the task of conquest. During that time, Topa Inca conquered the Northern Highlands of Peru, the Southern and Central Highlands of Ecuador, and then the Northern and Central Coastal areas of Peru. When Inca Yupanqui died around 1471 AD, and Topa Inca became Sapa Inca and took over the empire. During Sapa Incas rule, the empire virtually doubled in size, with the conquest of the lands of the Southern Coast of Peru, the northern half of Chile, Northwest Argentina, and Eastern Bolivia. This was done less than sixty years before Piz arro marched into Cajamarca (Davies 125-129). The successor to Sapa Inca was his son Huayna Capac in 1493 AD. When Topa Inca died ca. 1493 AD, he was succeeded by his son Huayna Capac. The empire had expanded rapidly to absorb millions of people spread over thousands of miles of land, and Huayna Capac had to concentrate much of his effort on quelling various rebellions in the north and defending the large border. Thus, when Huay...

Cmo se acredita la ciudadana americana

Cmo se acredita la ciudadana americana La ciudadanà ­a americana da importantà ­simos derechos. Pero para disfrutralos hay que acreditar que se es estadounidense. Estos son los documentos que puedes utilizar. Formas Principales de Acreditar la Ciudadanà ­a Americana Son vlidos cualquiera de los siguientes documentos: Pasaporte americano, que no puede estar daà ±ado ni manipulado.El  certificado o acta de nacimiento, si has nacido en Estados Unidos.  Tiene que ser emitido por el estado, el condado o el municipio donde se haya producido. En ese enlace se explica cà ³mo obtener una copia.El Reporte Consular de Nacimiento en el Exterior, (documento conocido como FS-240), si has nacido en otro paà ­s o en una base militar de los EEUU y adquiriste la nacionalidad por tu padre o por tu madre. Para tener este reporte tu progenitor americano tiene que haber registrado el nacimiento y la ciudadanà ­a en el consulado o embajada ms cercano. (Dependiendo del aà ±o en que has nacido puede que tengas un Certificate of Report of Birth (documento DS-1350), que ahora ya no se emiten, pero si lo tienes es totalmente vlido).El Certificado de naturalizacià ³n, para las personas que nacieron en otro paà ­s y que emigraron a Estados Unidos y tras ser residentes solicitaron adquirir la nacionalidad estadounid ense.El Certificado de ciudadanà ­a en los siguientes 3 casos que se explican a continuacià ³n: En primer lugar, si has nacido en el extranjero y tu padre o tu madre cumplen con las condiciones para transferirte la nacionalidad americana por derecho de sangre y no inscribieron tu nacimiento en la oficina consular. En segundo lugar si has nacido en el extranjero y tu padre o tu madre biolà ³gico (no vale casos de hijastros) se convierte en ciudadano por naturalizacià ³n. Adems tienen que cumplirse otros requisitos para esta ciudadanà ­a automtica: antes de cumplir los 18 aà ±os de edad has entrado a Estados Unidos como residente permanente legal y vives con tu padre o madre que se ha hecho ciudadano En tercer lugar, si has entrado en EEUU como un IR-3 en los casos de adopcià ³n por un ciudadano americano. Formas Indirectas de Demostrar que se es Estadounidense En ocasiones muy extraordinarias podrà ­a darse el caso de que una persona es ciudadana americana pero no tiene forma de obtener ninguno de los documentos mencionados anteriormente. En estos supuestos- muy raros- se podrà ­a demostrar de forma indirecta. Caben dos posibilidades: Si se has nacido en el extranjero y eres ciudadano por derecho de sangre segà ºn la ley que aplicaba en el momento en que naciste pero no tienes ni Certificate of Report of Birth ni Consular Report of Birth Abroad se probar la ciudadanà ­a presentando: el acta de nacimiento traducido al inglà ©sevidencia de la nacionalidad estadounidense de ambos padres o de uno de elloscertificado de matrimonio de los progenitores (si lo hubiera)declaracià ³n jurada del padre o la madre americano detallando los lugares en los que ha vivido Si se ha nacido en los Estados Unidos y no aparece tu acta de nacimiento hay tres opciones para probar dicho nacimiento en USA  el formulario DS-10, declaracià ³n jurada de nacimiento. Sirve para obtener el pasaporte. Debe ir acompaà ±ado de una nota oficial de que no existe acta de nacimiento aceptable. Carta de falta de rà ©cord. Deber ir acompaà ±ada por los denominados Informes Pà ºblicos Tempranos (Early Public Records). Entre esos se encuentran los certificados de bautismo o de nacimiento en un hospital, rà ©cords de escuela infantil, del censo o en la Biblia familiar. Incluso se admite en esta categorà ­a informes de atencià ³n mà ©dica justo despuà ©s del nacimiento.  Certificado de nacimiento retrasado siempre y cuando se haya realizado dentro de un aà ±o despuà ©s a dicho nacimiento. Si esta matriculacià ³n se realizà ³ ms tarde es necesario una declaracià ³n jurada de los padres o de las personas que atendieron el parto y tambià ©n presentar ejemplos de Informes Pà ºblicos Tempranos. No Sirven de Prueba de la Ciudadanà ­a No se admiten para acreditar el estatus de estadounidense ninguno de los siguientes documentos: La tarjeta del Nà ºmero del Seguro Social  La tarjeta de votante  La tarjeta de licenciarse del Ejà ©rcito americanoLa licencia de manejar Tips En ningà ºn caso los Informes Pà ºblicos Tempranos sirven, por sà ­ solos, para demostrar que una persona es estadounidense. Debern acompaà ±arse por documentacià ³n adicional ya mencionada. El pasaporte, el certificado de naturalizacià ³n, el de ciudadanà ­a, el Certificate of Report of Birth, el Consular Report of Birth Abroad y el acta de nacimiento en Estados Unidos valen todos como documentos para probar tanto la identidad como la ciudadanà ­a americana. Pero el pasaporte es sin duda el documento ms fcilmente reconocido por todos. Adems tiene otra ventaja: permite viajar al exterior y regresar a los Estados Unidos de Amà ©rica. Curiosidad Los latinos somos la minorà ­a ms grande en Estados Unidos. Prueba de ello es que dos apellidos hispanos estn entre los 10 ms comunes y 19 entre los top 100.

Youtube case Study Example | Topics and Well Written Essays - 250 words

Youtube - Case Study Example Despite this fact, critics remain largely skeptical about the sites business model. Its lack of movie content has made it a bà ªte noire of critics. Hollywood producers, however, do not see YouTube as a home for their content, but rather as merely as a great promotion tool. YouTube has a number of products and services. YouTube has ad products, which are crafted around the way people actually use the companys website. These ad products have helped transform users activities on the site, like searching content, into appropriate advertising opportunities. Some ad products are promoted videos, which are videos with the type of content a particular user has searched for in the past. Another ad product is TrueView, which enables users to skip an ad entirely, but chargers advertisers if viewers choose the content and watch it the entire way through. YouTube also has click-to-buy products, where viewers become product consumers. YouTube services include Personalized Channels which is a predictive video service, similar to Pandoras service for music. In addition, YouTube has a streaming service, where important live events like sports and concerts from around the globe are broadcast live to viewers. Further, YouTube has a partner program, whereby, YouTube places ads next to popular videos or producers and they share the revenue from these ads. Other services include searching and viewing videos. YouTube has a competitive edge over its rivals. While other video programs like Hulu and Netflix continue to grow, they have not made a significant impression on the market. Nevertheless, Netflix and Hulu have other services which YouTube does not offer. For example, they have taken a lead in movies, which is still not well implemented by YouTube. Overall, it will take some time and increased efforts, before any competitor makes an impact on the video platform like YouTube has

Compare columbus two letters regarding his voyages.how are they Essay

Compare columbus two letters regarding his voyages.how are they different in term of tone and diction.give specific examples that demostrate these differences and supply a reason for the difference - Essay Example This letter had a lot of exaggeration concerning the number of concurred islands and their wealth. Columbus wrote his letter to Gabriel while still on board the ship at the canaries (Winsor, 1891). Unlike the other letter, this letter described difficulties experienced in their voyage. This letter was also written to show the difficulties the crew had to endure in order to make a successful voyage. Unlike the previous letter, this second letter was written in a less optimistic tone. The second letter was also written from reality and, therefore it lacked exaggeration. The letter written to Louis contained many myths and hence unrealistic. In the letter written to Louis, Christopher talks about having discovered strange islands and communities. He talked of having discovered an island with fierce man-eating monsters. In his letter to Gabriel, Christopher talked about a storm that they encountered at the canaries and, this indicates the reality in the

Master and slave operation Essay Example for Free

Master and slave operation Essay Bluetooth devices exist in small ad-hoc network configuration with the ability to operate as either master or the slave; the specification also allows a mechanism for master and slave to switch their roles. The configurations can be single point, which is the simplest configuration with one master and one slave. Multipoint, called a Piconet, based on up to 7 slaves clustered around a single Master. And a third type called a Scatternet, this is a group of Piconets effectively hubbed via a single Bluetooth device acting as a master in one Piconet and a slave in the other Piconet. The Scatternet permits either larger coverage areas or number of devices than a single Piconet can offer. Figure 5 outlines the different master and slave topologies permitted for networks in the standard (see â€Å"Bluetooth: Goodbye Infrared†). The role of the master is to control the available bandwidth between the slaves, it calculates and allocates how often to communicate with each slave and locks them into the appropriate frequency hopping sequence. The specification describes an algorithm that calculates the hop sequence, the seed being based on the master’s device address and clock. In addition to hop sequence control, the master is responsible for transmit control by dividing the network into a series of time slots amongst the net members, as part of a Time Division Multiplexing (TDM) scheme. These time slots can consist of data and potentially additional voice traffic i. e. you will always need a data channel before you can add a voice channel. The time slot is defined as 625  µs and all packet traffic is allocated 1, 3 or 5 slots, grouped together in transmit and receive pairs. Prior to connection some operations such as inquiry, paging and scanning operations may sometimes occur on half slots (see â€Å"Bluetooth: Goodbye Infrared†). Figure 5: Point to point, Piconet and Scatternet. A. 2. 3 Voice and Data Links. Bluetooth carries communication traffic over two types of air interface links defined as Asynchronous ConnectionLess (ACL) or Synchronous Connection Oriented (SCO). During a connection the links carry voice and data traffic in the time slots and are categorised as either time critical, as used for voice and audio, or high speed non-time critical data with a mechanism for acknowledgement and re-transmission. The first link established between master and slave is the ACL link and carries high speed data that is insensitive to time. It is packet switched, as the data is sporadic in nature, asynchronous, contains asymmetric and symmetric services and uses a polling access scheme. A master may be permitted to have a number of ACL links up to the maximum number of slaves permitted by the specification but only one link is allowed between any two devices (see â€Å"Bluetooth: Goodbye Infrared†). Once an ACL has been established a SCO link can be created on top of the ACL link. The SCO link is circuit switched; it has symmetric synchronous services and has slot reservation at fixed intervals, making it suitable for time critical data such as voice. The specification restricts the number of SCO links that a master can support to three. Summarising the two types of links: ACL ? Packet constructed of a 72 bit access code, a 54 bit packet header, a 16 bit CRC and Payload data ? Largest data packet is DH5 giving 723. 2 Kb/s as highest data rate in one direction. ? Non time critical data ? Asynchronous ? Packet switched ? Polling access SCO ? Same access code and header as ACL packets ? ARQ (Automatic Repeat reQuest) and SEQ (SEQuence) flags redundant since flow control and re-transmissions do not apply ? Cyclic Redundancy Code (CRC) field is absent? Payload fixed at 30 bytes, with source data of 10, 20 or 30 bytes ? Circuit switched ? Symmetric synchronous services ? Slot reservation at fixed intervals A special case exists that mixes SCO and ACL packets. Known as the Data Voice (DV) packet it carries data and voice on regular intervals like the SCO. The voice data has no flow control or CRC as per SCO packets, whereas the data part of the DV packet has flow control, re-transmission of the data part is permitted and the data part is CRC protected (see â€Å"Bluetooth: Goodbye Infrared†).

Essay --

While viewing The Conversation I was struck by the quality sound design. As we previously watched Gravity weeks prior it became clear why a movie like that would need many sound engineers to balance all the special effects one would get in an IMAX theatre. However, this feature goes in depth about Harry who is a Bugger, one who records people’s conversations or sounds, such as a private investigator. His job is to record others conversations and not ask questions from his employer. To capture the reality and impact of a story, sound technicians must manipulate the dialogue with any background or source music to flow naturally. As audience members, we do not recognize the complexity and extreme measures sound editors go to in order to capture everyday sounds of background noises and/or to highlight specific aspects of the world the character may be experiencing with more focus. When I think of films with great sound design, I usually think of the action or adventure genres. Al though The Conversation is not an action film, it exudes a powerful sound design that is quite impressive. The sound is greater than you could expect, or maybe even notice, on an initial viewing. The storyline allows its main character, played by Gene Hackman, to act as an on-screen sound mixer. Through the film’s volume changes the sound perspectives within the diegetic space were interesting to follow through listening intently. The dramatic differences are between looking down a street or standing in the street. Such as when Harry is trying to take the bongo drums out of the recording so he can clearly hear the vocals of the two people he is recording with precision. When watching the film I saw that Walter Murch actually did some of the sound design on... ...t within the diegesis we hear music that exemplifies his state of mood. He vigorously searches his apartment in hopes to find the bug that they placed in his apartment that is mentioned in the phone call. The piano starts out slowly then speeds up as he breaks everything in the place to the point he would need to replace it. It then fades off with Harry sitting on the torn up floor with the piano at a medium pace and him playing the saxophone showing his disappoint that he was one upped by someone. Lastly, in today’s world The Conversation still serves as a contemporary cautionary tale. It reminds us how important sound designers are to the world of filmmaking or private investigators that must record sounds. In today’s films we have made a huge breakthrough with sound technologies such as Dolby Atmos, which can only get better with advancement in future updates.

A Good Man Is Hard to Find: Irony

â€Å"A Good Man is Hard to Find† In the short story, â€Å"A Good Man is Hard to Find† there is irony all through the pages. It shows how you should follow your gut instinct when you think you shouldn’t go somewhere, when you know something bad is going to happen. In the story it also talks about how the grandmother wore her nice clothes in case of an accident, she wanted to look like a lady in case anything bad was to happen. The grandmother was constantly talking about the good in people, but was she a good woman? The first bit of irony the story throws at the reader is on the first page when the grandmother is talking about how she doesn’t want to go to Florida because that’s where the Misfit is headed. As the grandmother is trying to get her son Bailey to listen as she says, â€Å"The Misfit is aloose from the Federal Pen and headed toward Florida and you read here what it says he did to these people. Just you read it. I wouldn’t take my children in any direction with a criminal like that aloose in it. I couldn’t answer to my conscience if I did† (O’Connor 281). Now I don’t believe that the ironic twist is that the misfit was headed to Florida just like the family, I believe that the twist is that the Misfit just so happen be on the same dirt road that the grandmother asked her son Bailey to turn down later on in the story. The grandmother wanted to turn down this dirt road in Georgia because she remembered an old plantation house she had visited when she was younger. After turning down the road she then remembered that this was not the road at all, the old plantation house she had remembered was in Tennessee, not Georgia. The second major ironic twist that stood out to me was how the grandmother wore good clothes to go on a road trip, â€Å"In case of an accident, anyone seeing her dead on the highway would know at once she was a lady† (O’Connor 282). The grandmother wore a navy dress with a straw hat that had white violets on it. Indeed the grandmother was dressed like a lady, but did she act upon it at all times? I think she did just that, I believe she acted like a lady but was not truly one. Grandmothers cat caused Bailey to have an accident. †¦as the grandmother limped out of the car, her hat still pinned to her head but the broken front brim standing up at a jaunty angle and the violet spray hanging off the side† (O’Connor 287). At this point is when I believe that the grandmother acts as if she is a lady. If she was a true lady then maybe her clothes would not have been messed up, or there wouldn’t have been an accident at all. But there is still that piec e of thought about how the grandmother knew to dress in case of an accident. The final bit of irony is how the grandmother kept talking about good men, and how they are hard to find. When the family stops at the diner to eat she talks to Red Sammy and his wife about how hard good men are hard to find, but then she also tells Red Sammy that he is a good man because he let a couple of men charge gas. Red Sammy’s wife says there isn’t no one that she can trust, â€Å"‘And I don’t count nobody out of that, not nobody,’ she repeated, looking at Red Sammy† (O’Connor 285). After they wreck a car shows up with The Misfit and his two side kicks in it, who turn out not to be good men. The grandmother realizes real soon that the man is The Misfit, she recognized him from the picture in the newspaper. Soon after arriving Bobby Lee takes Bailey and his son John Wesley into the woods to kill them. The grandmother went on about how the Misfit could be a good man, and how he should pray. The Misfit told her that his family was good people, he just wasn’t. Soon Bobby Lee and Hiram took the childrens mother, June Star, and the baby to the woods to meet up with the boys. The grandmother then realized that she must think of something soon, because she would be next. They started talking about Jesus and how he did or didn’t raise the dead. The Misfit said that if he didn’t know but if he would have been there he would have known better and wouldn’t be the way he is now. â€Å"Why you’re one of my own babies. You’re one of my own children! † (O’Connor 293). After the grandmother said that she touched him on the shoulder and the Misfit turned around and shot her three times in the chest. This was a great short story for irony, because the grandmother was correct about most things. The grandmother knew not to go towards Florida because The Misfit was headed that way after escaping from the pen. She was right about dressing like a lady in case of an accident, because indeed there was an accident, but she caused the accident by bringing her cat along without anyone knowing. Then there is speak of a good man, is there any such thing? Red Sammy’s wife wouldn’t even think of him as a good man, if your wife doesn’t believe you are no one really can. The Misfit comes along and talks to the grandmother for a while about good people, while doing so shoots her family then her dead. ‘â€Å"She would have been a good woman,† The Misfit said, â€Å"if it had been somebody there to shoot her every minute of her life†Ã¢â‚¬â„¢ (O’Connor 293). This goes with my assumption that the grandmother was just acting like a lady, and The Misfit even saw through her lies.

The Preventing Workplace Discrimination

a. People with disabilities or drug abuse problems can be accommodated in several ways. It is especially important to accommodate those with disabilities. The physical workplace setup can for example be arranged in such a way to be more accessible to the blind or wheelchair bound. Those with hearing disabilities can be accommodated by providing interpreters during meetings or interactions with the rest of the workplace staff. In terms of drug abuse, programs and workshops focusing on the problem, its consequences and its management can be offered. If not voluntary, such persons can be forced to attend under threat of losing their jobs. b. Personality, attitude toward work, and future upward mobility are very important considerations for hiring future employees. In terms of the first, it is important to consider whether the employee will be better suitable for teamwork or individual tasks, for example. The personality in this case will determine which requirements the employee will be best suited for, and must be aligned with the requirements of the job being applied for. Attitude towards work is probably the most important consideration. An employee with a positive attitude is much more valuable and more likely to succeed in any job situation than one with a negative attitude. Upward mobility is a consideration that will carry particular weight according to the nature of the job being applied for. An employee that is upwardly mobile will probably be more motivated to perform well than one who is not. c. I believe that Title VII can and will override the employment environment and conditions in a written employment contract. The reason for this is that an employee signing a contract may be unaware of the current legislation regarding such conditions. An employee's willingness to work under certain conditions does not change the law regarding these conditions. It is the job of the employer to educate him- or herself regarding the newest legislation, and complying with this. Non-compliance can result in legal problems and a negative public image for the company.

The High School Science Classes You Should Take

The High School Science Classes You Should Take SAT / ACT Prep Online Guides and Tips Which science classes will you be required to take in high school, and what will you learn in them?Which science subjects will colleges expect you to have studied, and how can you impress them by exceeding expectations? Read this guide to learn about standard science curriculum, AP and IB science courses, college expectations, and ways you can exceed those expectations and use your high school science classes to strengthen your transcript. Standard High School Science Curriculum Most high schools require students to complete 2 or 3 years of science classes in order to graduate, and these classes will often include a laboratory component where students conduct hands-on experiments as part of the class. The course sequence for science classes in most high schools goes biology → chemistry → physics. Some schools teach earth science freshman year then move on to biology and chemistry, and some schools follow the "Physics First" curriculum where studentstake physics as freshman. However, the majority of schools follow the course sequence outlined below: Freshman Year: Biology Biology is usually the first science high school students are taught because it has less of a focus on math than other science subjects, so freshman have time to develop their math skills before moving on to more math-focused sciences Main topics include: cells, the organism and its relationship to the environment, human growth and development, ecology, genetics. Sophomore Year: Chemistry Chemistry generally has a greater emphasis on mathematical concepts and lab work than biology. Main topics include:introduction to acids and bases, the mole concept, reaction rates, and chemical energy. Junior Year: Physics or Earth/Physical Science This is probably the first year you will have a choice in regards to which science subject to study: physics or earth/physical science Physics Physics is most often taken by students more confident in their scientific and math abilities, those planning to study science or math in the future, and those who want to get into more competitive colleges.Physics frequently requires math skills (algebra level and above). Main topics include:concepts of time, space, and matter, motion and forces, optics and light, electricity and magnetism, atomic physics. Earth/Physical Science Different schools may have different names for this course, but most classes will cover topics from both earth and physical science.These classes are less math-intensive and often considered less rigorous than physics. Main topics in earth science:geology, weather, astronomy, life processes. Main topics in physical science:kinetics, mechanics, optics, electricity, magnetism. Should You Take Physics? Itlooks better on your transcript if you do, but most colleges don’t require it, unless you plan on majoring in math or science. Ifyou are applying to a highly competitive school, plan on studying math or science in the future, or are confident in your math and science abilities, then you should take physics. Ifyou struggle with math and science and aren’t planning on majoring in those fields, then it’s probably fineto take earth/physical science instead. However, try to take higher level classes in other subjects like English or social studies to keep your transcript strong. Senior Year: Optional Electives There is no standard science subject for high school seniorsMost high schools do not require seniors to take a science class, but if you choose to, you can take electives.Electives are offered on a wide variety of subjects, including astronomy, human biology, and zoology. Senioryear is also an excellent year to strengthen your transcript by taking AP science classes (see â€Å"How can you Exceed Expectations† section below). You'll have the opportunity to take a variety of science classes in high school. Image source: Pearson Which Science Classes Do Colleges Expect You to Have Taken? Similar to high schools, most colleges require applicants to have taken 2-3 years of science. These requirements also often include passing biology and chemistry. However, if you are applying to a highly competitive college, be aware that many require or highly recommend completing 4 years of science in high school, and they sometimes alsorequire your 4th year of science to be an AP science class. Regardless of the type of college you are interested in attending, if you plan on majoring in a STEM (science, technology, engineering, and math)field, you will be expected to have taken 4 years of science in high school, including physics. How Can You Exceed Expectations? If you are not planning on majoring in a STEM field or applying to a highly competitive college, it is more important for you to focus on courses more closely related to your future major than trying to exceed colleges' expectations with your science classes. Colleges are more interested in how well you did in the subjects you plan to continue studying in college. Completing 3 years of science and getting solid grades in those classes is typically all you need to do to meet the expectations of college admissions officers. However, if you are able to take 4 years of science, possibly with some of those classes at an honors or AP level, that's great and will strengthen your transcript, but don't pursue challenging science classes if it causes your grades in the area you plan to major in to drop. If you plan to study a STEM field, it’s important to show you have strong science skills, and your science coursework should go beyond basic entrance requirements. You will likely be using at least some of the skills you learn in your science classes in your future career, and colleges want to be sure you can handle the subject material before they admit you. Also, you will be competing for a spot with many other talented STEM students, so it is important to exceed expectations to help yourself stand out. You can accomplish this by taking4 years of science, taking science courses at the highest level they are offered (honors or AP), and getting high grades in those classes. More specifically: Take honors classes if possible your first 3 years Take physics instead of earth science Take one or more AP science classes your senior year Get strong grades in these classes Below are several examples of advanced science classes. AP Classes The main AP science classes AP Biology, AP Chemistry AP Physics C (calculus based), and AP Physics 1 and 2 (algebra based). These classes expand on material learned inregular or honors-level courses, but are more rigorous, require more math skills, and often have a greater lab component. If you plan on taking one or more of these classes your senior year, make sure you have enough room in your schedule. Because of the number of labs students in these courses must complete, these classes sometimes take 1.5 or 2 class periods a day in order to fit in all the required material. Of the three subjects, none is automatically the â€Å"best† to take;all three are rigorous courses known for having challenging AP exams (although Physics C is generally viewed as more difficult than Physics 12 because it requires knowledge of calculus). If you decide to take one of these courses, choose the one youthink most relates to your future studies and career, or look at college websites to see which course would get you the most college credits, and make your decision that way. AP Environmental Science isalso another option, and it focuses on human impacts on the environment, climate change, interrelationships of the natural world, and ways of developing solutions to environmental problems.This course is not considered quite as rigorous as the other AP science classes because it usually doesn’t have an honors prerequisite, and it requires less math and lab work.However, it is still an AP course and will therefore still be challenging and viewed more highly than taking non-AP science electives. AP Environmental Science is a good option for someone who wants to take an AP science but without as much rigor or time commitment as the other AP science courses, or for someone who is already taking a different AP science class and wants to add another that only takes up one class period. IB Classes Inorder to obtain the IB diploma, you must take at least one course from each of the six IB subject categories. Science is one of those categories, with seven different IB options. IB courses are offered at standard level (SL) and high level (HL). The IB science courses are as follows: Three Main Science Courses: Biology, Chemistry, and Physics These three classes arecomparable to AP courses, although IB courses often include more report writing and lab work. Particularly if you plan on studying science in college, it would be a good idea to take one of these three courses for the group requirement, as they are the science subjects colleges are most interested in. All three offered at SL and HL Computer Science This course focuses on computational thinking and how computers work. It also includes practical activities, such as programming. This is a good option if you plan on studying computer science or a similar subject in college. SL and HL Design Technology This course teaches students how to create solutions to common problems using the design cycle and technology. Main subjects taught include modeling, sustainable production, and innovation and design. SL and HL Environmental Systems and Societies This is an interdisciplinary course that focuses on conservation and biodiversity, pollution management, and environmental demands of human populations. SL only Sports, Exercise, and Health Science This course focuses on human anatomy and physiology, as well as nutrition, psychology, and biomechanics. SL only Want to build the best possible college application? We can help. PrepScholar Admissions is the world's best admissions consulting service. We combine world-class admissions counselors with our data-driven, proprietary admissions strategies. We've overseen thousands of students get into their top choice schools, from state colleges to the Ivy League. We know what kinds of students colleges want to admit. We want to get you admitted to your dream schools. Learn more about PrepScholar Admissions to maximize your chance of getting in. More Options for Science Classes If you want to take a specific science class, perhaps one that is closely related to your future career, or you simply want the opportunity to take more science classes beyond the required curriculum, there are several ways to do this. Electives While taking an AP science class will look most impressive to colleges, electives are always an option as well, particularly if you don't plan on majoring in a STEM subject. Many schools offer a wide range of science electives, and they are agreat way to take a class in a more specialized field of science you’re particularly interested in, or to add more science courses to your transcript if you don’t have the time or desire to take an AP science course. Community College Classes Ifyour school doesn’t offer a specific AP science class or elective, you may be able to take a similar course at a local community college. This is also a way to take higher-level science classes most high schools don't offer, including advanced classes in biology, chemistry or physics. While taking a college-level class can be difficult, it will look great on your transcript, and you often get college credit for it. Talk to your guidance counselor to learn how to enroll in community college classes. Career-Focused Options It'sbecoming more common for high schools to offer classes developed specifically for students planning a particular science career, such as one in medicine or research.My school had a course students who wanted to become doctors could take, where three days a week they would have a standard human physiology class, and twice a week they would visit a local hospital and observe doctors and nurses. Similar to job shadowing, this is a great opportunity to get more hands-on experience and see if a particular career is right for you.Even if your school doesn’t offer classes like that, you may be able to set up something similar as an independent study. Your school may offer science classes specifically for students thinking about pursuing a degree in medicine Summary Most colleges and high schools require you to complete 2-3 years of science. You will probably be required to take biology and chemistry your first two years of high school. Take physics your junior year if any of the following apply: you are confident in your math and science abilities, you plan on majoring in math, engineering, or science in college, or you are looking to attend a top college. If you plan on majoring in a STEM field, you should take 4 years of science,including an AP science class your senior year, if possible. If you will not be majoring in a STEM field, consider taking science electives your senior year. What's Next? Trying to decide whether AP or IB is better? Check out our guide to see which program is best for you! Also wondering about which math classes you should take in high school? We have a guide that explains standard curriculum, course sequence, and ways to impress colleges with your math classes. Are you considering summer academic programs for middle school and high school students? Look at our guides on theSIG, CTY, and Stanford EPGYprograms. Want to improve your SAT score by 160 points or your ACT score by 4 points?We've written a guide for each test about the top 5 strategies you must be using to have a shot at improving your score. Download it for free now:

Mass Spectrometry - What It Is and How It Works

Mass Spectrometry - What It Is and How It Works Mass spectrometry (MS) is an analytical laboratory technique to separate the components of a sample by their mass  and electrical charge. The instrument used in MS is called mass spectrometer. It produces a mass spectrum that plots the mass-to-charge (m/z) ratio of compounds in a mixture. How a Mass Spectrometer Works The three main parts of a mass spectrometer are the ion source, the mass analyzer, and the detector. Step 1: Ionization The initial sample may be a solid, liquid, or gas. The sample is vaporized into a gas and then ionized by the ion source, usually by losing an electron to become a cation. Even species that normally form anions or dont usually form ions are converted to cations (e.g., halogens like chlorine and noble gases like argon). The ionization chamber is kept in a vacuum so the ions that are produced can progress through the instrument without running into molecules from air. Ionization is from electrons that are produced by heating up a metal coil until it releases electrons. These electrons collide with sample molecules, knocking off one or more electrons. Since it takes more energy to remove more than one electron, most cations produced in the ionization chamber carry a 1 charge. A positive-charged metal plate pushes the sample ions to the next part of the machine. (Note: Many spectrometers work in either negative ion mode or positive ion mode, so its important to know the setting in order to analyze the data.) Step 2: Acceleration In  the mass analyzer, the ions are then accelerated through a potential difference and focused into a beam. The purpose of acceleration is to give all species the same kinetic energy, like starting a race with all runners on the same line. Step 3: Deflection The ion beam passes through a magnetic field which bends the charged stream. Lighter components or components with more ionic charge will deflect in the field more than heavier or less charged components. There are several different types of mass analyzers. A time-of-flight (TOF) analyzer accelerates ions to the same potential and then determines how long is needed for them to hit the detector. If the particles all start with the same charge, the velocity depends on the mass, with lighter components reaching the detector first. Other types of detectors measure not only how much time it takes for a particle to reach the detector, but how much it is deflected by an electric and/or magnetic field, yielding information besides just mass. Step 4: Detection A detector counts the number of ions at different deflections. The data is plotted as a graph or spectrum  of different masses. Detectors work by recording the induced charge or current caused by an ion striking a surface or passing by. Because the signal is very small, an electron multiplier, Faraday cup, or ion-to-photon detector may be used. The signal is greatly amplified to produce a spectrum. Mass Spectrometry Uses MS is used for both qualitative and quantitative chemical analysis. It may be used to identify the elements and isotopes of a sample, to determine the masses of molecules, and as a tool to help identify chemical structures. It can measure sample purity and molar mass. Pros and Cons A big advantage of mass spec over many other techniques is that it is incredibly sensitive (parts per million). It is an excellent tool for identifying unknown components in a sample or confirming their presence. Disadvantages of mass spec are that it isnt very good at identifying hydrocarbons that produce similar ions and its unable to tell optical and geometrical isomers apart. The disadvantages are compensated for by combining MS with other techniques, such as gas chromatography (GC-MS).

Slavery and movents to end it Essay Example | Topics and Well Written Essays - 500 words

Slavery and movents to end it - Essay Example However, the most flourishing anti-slavery movement at that time was the abolitionism movement. The main objective of abolitionism was to radically emancipate all slaves in the country and to end segregation and discrimination that was rampant in the American society at the time (Filler 1833). The radical nature of abolitionism distinguished the movement from other movements of its historical period. Abolitionism movement was also fueled by religious dedication in the second great awakening. The movement’s popularity therefore attracted contradictory and similar opinions from different scholars. The authors, Douglass, Pessen, and Thoreau held similar opinion on the necessity of radical transformation in ending slavery in the United States of America. In his writing, Frederick Douglass emphasized the need for immediate and radical action to end slavery and racism in the state. He offered an indomitable voice of hope to slavery in his writing. In his lecture, Frederick also talked about the need to embrace anti-slavery politics in the country. In his writings, Pessen talked about the need to fight for equality of the entire American citizenry. He condemned the unjust glorification of man through the use of erroneous information. During the abolitionism movement, Pessen discussed how the enslaved women and black Americans were mistreated by the government and other owners of the means of production (David 177). Henry David Thoreau emphasized the need for civil noncompliance in the fight for the rights of the enslaved minorities and women in the society. He was once imprisoned for breaking the law by declining to remit tax revenues. It is clear that, Douglass, Pessen, and Henry David Thoreau advocated for a radical movement that would eliminate slavery and forge discussions for fairness justice for all citizens of America. These renowned authors were solidly behind the abolitionism movement. The three held diverse opinions on the manner in which radical