The Physics Of Sound Essays - Acoustics, Waves, Sound,

The Physics Of Sound Sound surrounds us at all times. The ring of an alarm clock or the whistle of birds may wake us up in the morning. Through out the day, we hear a variety of sounds; for instance, the banging of pots and pans, the roar of traffic, and the voices of people. When we fall asleep at night, we might listen to the sounds of frogs croaking or the wind whistling. All sounds have one thing in common. This being that the vibrations of an object makes every sound. When an object vibrates, it causes the air around it to vibrate. The vibrations in the air travel out from all directions of the object. They then reach our ears, and the brain reads them as sounds. Many sounds we hear travel through the air; however, they can also travel through solid objects like the earth. Our voice is made in the larynx, which is a part of the throat. Two small pieces of tissue are spread across the larynx. These pieces, called vocal chords, make the opening smaller. Air from he lungs quickly passes trough the tightened chords, causing them to vibrate. The vibrations make the sound of the voice. The tighter the chords are, the faster the vibrations and the higher the resulting sound. If a rock is thrown onto a still pond, several waves travel out from the place where the rock hit the surface. Likewise, sound moves in waves through the air or some other medium. The understanding that sound travels in the form of waves may have originated with the artist Leonardo Da Vinci in 1500. Generally, waves can be spread transversely or longitudinally. In both cases, only the energy of wave motion is spread through medium. No portion of the medium actually moves very far. As the waves caused by the moving object travel outward, they are carried by a medium. This movement causes compression. As the movements move backward it is called rarefractions. Sound requires a medium to travel; therefore, it cannot travel in space, which is a vacuum with no medium. The number of compressions and rarefractions per second is called frequency, The more rapidly and object vibrates, the higher the frequency. Frequency is measured in hertz. As the frequency of a sound wave increases, the wavelength decreases. Wavelength is the distance between one point on a wave to the corresponding point on the next wave. Most people hear sounds with frequencies that fall between 20 and 20,000 hertz. Many animals can hear sounds about 20,000 hertz. A person's voice can have a range of about 85 to 1,100 hertz. When sound waves leave one medium and enter another in which the speed of sound differs, the direction of the waves is altered. This change in direction results from a change in the speed of waves called refraction. Sound waves can also be refracted if the speed of the sound changes according to their position in a medium. The waves bend toward the region of slower speed. Sound travels farther when the air is cooler. During the day, the ground is warmer than the air above. Sound waves are bent away from the ground into the cooler air above, where their speed is slower allowing the sound to be heard over longer distances. The spreading out of waves as they pass by the edge of an obstacle or through and opening is called diffraction. It occurs whenever a sound wave encounters an obstacle or opening. Diffraction enables sound to be heard around a corner, even though no straight path exists from the source of the sound to the ear. If sound travels at about the same speed in both materials with the same density, little sound will be reflected. Instead, most of the sound will be transmitted into the new medium. If the speed differs greatly in the two mediums and their densities are greatly different, most of the sound will be reflected. The intensity of a sound is related to the amount of energy in the sound waves. Intensity depends on the amplitude of the vibrations making the waves. Amplitude is the distance that the object producing the sound travels as it vibrates.

President George W. Bush is preparing for war with Iraq. essays

President George W. Bush is preparing for war with Iraq. essays President George W. Bush is preparing for war with Iraq. Before he goes to war he has to address the issue with Congress and with NATO. My opinion is that we should go to war with Iraq and Saddam Hussein. He has been in power for a while and continues to pose a threat to the world. Saddam Hussein is a threat to the world. As leader of Iraq, he poses a threat with neighboring countries as well as the rest of the world. Hussein is believed to be crazy enough to do anything to get what he wants. He has used chemical weapons before in war and there is nothing to stop him from doing it again. He used them in the war with Iran. He also has an oil embargo on the U.S. and his country contains most of the oil in the world. Hussein is also jeopardizing national security in the U.S. and in other countries as well. The events of "September 11 could have just as easily happened in London or Paris" says Prime Minister of Great Britian Tony Blair. He is absolutely correct. Investigations have shown that Hussein has supplied the al-Qaida and the Taliban in Afghanistan. He is threatening other countries when he threatens the U.S. and those other countries are in danger of him too. There is evidence that Saddam Hussein is building nuclear weapons. If he succeeds then it is likely that he will use them. With possession of nuclear weapons, Hussein could start a nuclear war and with all of the deadly weapons in the world today, this war could end the existence of earth. There is nothing to stop him from using weapons of mass destruction in war. There is also a nuclear arms treaty that he violating. He has been keeping inspectors out of his country since 1998. Why would he keep them out if he has nothing to hide? He is building nukes and he doesn't want anybody to take them away, that's why. Hussein is crazy enough to start a nuclear war. Hussein should be kicked out of power. He is a threat to...

How to Use the French Expression Nest-ce Pas

How to Use the French Expression Nest-ce Pas The French expression  nest-ce  pas (pronounced nes-pah) is what grammarians call a tag question. Its a word or short phrase that is tagged on to the end of a statemen, to turn it into a yes-or-no question. It is a  question  added to a  declarative sentence to engage, verify, or confirm. Question tags use the auxiliary verb in the opposite form of the sentence itself. If a sentence is negative, the question tag takes the positive form of the auxiliary verb and vice versa. Most of the time, nest-ce  pas is used in conversation when the speaker, who already expects a certain response, asks a question mainly as a rhetorical device. Literally translated,  nest-ce pas  means is it not, though most speakers understand it to mean isnt it? or arent you? In English, tag questions often consist of the specific verb from the statement combined with not. In French, the verb is irrelevant; the tag question is just nest-ce pas. English tag questions right? and no? are similar in usage to nest-ce pas, though not in register. They are informal, whereas nest-ce pas  is formal. The informal French tag question equivalent is non?   Heres a quick review of principle tenses, the auxiliary form they take, and an example of a positive and a negative question tag for each tense. Examples and Usage Vous à ªtes prà ªt, nest-ce pas? –  Youre ready, arent you?Elle est belle, nest-ce pas? –  Shes beautiful, isnt she?Nous devons partir bientà ´t, nest-ce pas? –  We have to leave soon, dont we?Il a fait ses devoirs, nest-ce pas? –  He did his homework, didnt he?Ils peuvent nous accompagner, nest-ce pas? –  They can come with us, cant they? More French Resources Expressions with à ªtreExpressions with pasMost common French phrasesQuestions in French

Is art In The 21st Century still influenced by modernism Essay

Is art In The 21st Century still influenced by modernism - Essay Example Post minimalism on the other hand, is a term that is used to mean a range of styles that are related, yet which often have very, even opposing interests. Arising almost immediately after minimalism, it also refers to tendencies such as Body art, Process art, Performance, Site-Specific art, and aspects of Conceptual art. New developments in art and design came fast in the 1960s no sooner had minimalism started evolving. Unlike minimalism, the art often combines unusual, soft and often is used in more exploited and open structures. The first picture represents a sculpture that was modeled during the modern times while the second is that of the ancient contemporary art. While the ancient sculpture is characterized by simplicity and less expression, that of modern art has a range of styles ranging from a blend of colors to complexity in structure, symbolism and full of expression. It portrays a bolder meaning of sentiment and still maintains its traditional form. The intent behind the modern sculpture is obviously to make a more objective, expressive, and non-referential work of art. The background of the two sculptures bring out a more distinct look as the in the modern one the artist has invested a lot into his art. Characterized by structural tendencies of the body and process art, the artist makes an even smoother and shinier finish in the modern sculpture as compared to that of the ancient sculpture where only the visual content is appealing. Unlike the ancient sculpture that is characterized by simplicity, the modern sculpture is more definitive, descriptive and even more appealing. Johannesson, Kerstin, and Carl Andre. "INVITED REVIEW: Life on the margin: genetic isolation and diversity loss in a peripheral marine ecosystem, the Baltic Sea." Molecular Ecology 15, no. 8 (2006): 2013-2029 Knutsen, H., P. E. Jorde, Carl Andrà ©, and N. C. H. R. Stenseth. "Fine†scaled geographical

Legal Brief Assignment Example | Topics and Well Written Essays - 500 words - 1

Legal Brief - Assignment Example f Sony to Court of Appeal for the Ninth Circuit, which ruled in favor of Universal City Studios and others and finally moved to US Supreme which ruled in favor of Sony. The provisions relating to unfair competition of the Lamham Act were applicable to this case in addition to 17 U.S.C. Â § 101 (Copyright Act of 1976). The fair use doctrine for use of copyrighted content, the provisions for copyright infringement in addition to provisions 17 U.S.C. Â § 106, which grants the copyright owners several rights were applicable for giving a verdict in every issue that was raised in this suit. The primary issue that was raised in his suit was whether Sony Corp. was liable for contributory copyright infringement by manufacturing the product named Betamax. The other issue was that whether Betamax itself was a product which could facilitate copyright infringement or it was a product whose purpose was to facilitate legitimate use by the copyright owners. This issue had to be determined in order to find answers to the first issue. The case first moved to the Federal District Court, where Sony Corp. won the case against its plaintiffs. The plaintiffs Universal Studios and Walt Disney then appealed to the Court of Appeals for the Ninth Circuit, where decision was passed in favor of the appellants Universal Studios and Walt Disney. Sony Corp. then finally decided to move the US Supreme Court for decision on the issue. The US Supreme Court ruled in favor of Sony Corp. by a 5-4 majority. Thus Sony Corp. was allowed to manufacture Betamax and later a product named VHS in US without becoming liable for copyright infringement and without being liable to pay any damages. The case establishes general rule in favor of technological development and favors the right of the general public to make rightful owners of copyright to make copies through technical devices for their own personal use. The general rule established in this case was that by manufacturing a product which can be used to

High school diploma Essay Example for Free

High school diploma Essay Did you know that education in school is really important? Many parents believe that education is important because it leads to a degree which grants you a good job. With an education you can get a steady pay check. With that pay check you will get away to financial independence as an adult. Why is Education So Important? he first thing that strikes me about education is knowledge gain. Education gives us knowledge of the world around us. It develops in us a perspective of looking at life. It helps us build opinions and have points of view on things in life. People debate over the subject of whether education is the only thing that gives knowledge. Some say, education is the process of gaining information about the surrounding world while knowledge is something very different. They are right. But then, information cannot be converted into knowledge without the catalyst called education. Education makes us capable of interpreting things rightly. It is not just about lessons in textbooks. It is about the lessons of life. Did you know that education in school is really important? School and education help people you understand beyond the world around them. Education helps ones immediate family, area, region, country, culture, race, or civilization. These different subjects open up information and knowledge. An important aspect of education is learning how to learn in order differentiate fact from fiction. Education is important because it equips us with all that is needed to make our dreams come true. Education opens doors of brilliant career opportunities. It fetches better prospects in career and growth. Every employer of today requires his prospective employees to be well educated. He requires expertise. So, education becomes an eligibility criterion for employment into any sector of the industry. We are rewarded for exercising the expertise required for the field we venture. We are weighed in the market on the basis of our educational skills and how well we can apply them. Education brings about economic wealth, political stability and social prosperity; all these are hallmarks of a prosperous society. It can therefore be said that education playas an important role if a society is to be successful. Tertiary education is an important aspect in the development of any society that considers or aspires to be modern. It is by far the best investment that a nation or an individual can make in its youth or oneself respectively. Educated people are in a better position to contribute to the development of their country; these educated individuals get employment opportunities that give them satisfaction and also earn some form of respect among their work mates. It also plays an important role in the integration of a society in that by interacting with people from various areas, it will raise different issues that people in rural areas are facing thereby promoting knowledge and understanding of these areas Life is nothing without education? Life without education is like living in the streets. Without education youll become lost. You will not have a guaranteed future. You will no go home ridding your favorite car to your Own home. By learning your basic alphabets youll work your way through to have a professional career. Therefore with out Education to school you will not learn at all. Life is never without education. In societies without formal schools, parents pass skills on to children. Education starts before you ever go to school and goes on after you finish school. That said, formal education is a great way to ensure that every child knows what is most necessary to live in a particular society. Without education you will be an illiterate person your children in the future will come up to you and you’re not going to know how to answer them with a right answer. Education will help build your own perspective. Schools are the place you school of started how to pronounce and count. Importance of education is needed in order to succeed in today’s world. In order to receive education you must go through some process. Your first process is to graduate from high school with your diploma. The next step is to attend college to obtain a degree in a trade that you would like to pursue. Without education you wouldn’t get good pay or promotion that you deserve. However, some people feel that they can get by in life without education, sadly that is not true. If you would like at the graphic at the bottom you will see that the higher the education you have the more money you can make. Education is important to have in today’s society. Importance of education able you to have a good job security and knowledge of your field supporting the hard work a person put into there education. Overall, school is the basic start that will drive you to your future. With knowledge youll get the sense of pride that you know must of the things. Education will help brighten your children’s future. 66% of the US population has a high school diploma or high. You should be amongst these people.

Joan of Arc :: essays research papers

Joan of Arc   Ã‚  Ã‚  Ã‚  Ã‚  Joan of Arc by Nancy Wilson Ross in nineteen-hundred and fifty-three and published by Random House. Nancy Wilson Ross was born in Olympia Washington; she wrote many books on the early fifteenth century including Joan of Arc.   Ã‚  Ã‚  Ã‚  Ã‚  Nancy Wilson Ross wrote of that Joan of Arc was a simple girl taken advantage of by a wimp of a prince/king who left her to be used and abandoned at the first sign of trouble; by those that she had helped the most. That Joan was divinely guided by her voices and manipulated by many to fit their will.   Ã‚  Ã‚  Ã‚  Ã‚  Mrs. Ross starts off by showing the extreme challenge of getting to see the Prince Dauphin. In the beginning she was laughed at and told to go back to her family farm, as a mere girl they had no need of her. But Joan did not give up and she waited till the war had gone on for awhile and was not going well and then she tried again. Joan was finally allowed to go to see her Prince and tell him of her voices, but first she had to endure a verification of the origin of her voices and of her that took quite a while longer. Joan in the mean time grew anxious for the Prince and for France as her voices were urging her to hurry and help Prince Dauphin get crowned King of France and save her country from the English.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  After Joan is proven fit, she is finally allowed to meet her Prince and finds that he is a weak-willed individual that is not inclined to make any decisions, least of all to put forth the effort to go to Reims and be crowned the King of France. Joan does convince him into letting her go out into the battle fields and help lead the soldiers to a victory. Joan was fulfilling a prophecy that said that â€Å"having been through a woman (the wicked plots of Dauphin’s Mother), would be restored by a girl from Lorraine.†   Ã‚  Ã‚  Ã‚  Ã‚  In battle Joan was smart and brave and gave the men hope that they could turn the war around. Joan dictated letters to the English generals that she did not want to hurt them and that they should go home, but they ignored her and she fought them till they turned and ran. Joan helped turn the tide to Frances advantage and then returned to Prince Dauphin to try to convince him to go to Reims and be crowned.