Physics of Paintball :: physics sport paint paintball gun

There are three main areas of paint world that I will be analyzing. First the way in which a paint eyeball leaves the barrel of a paintball marker. Second the way in which a paintball flys through the beam and lastly how to determine optimum ranges for paintballs.Firing a paintball As you fire the trigger, the paintball is being pushed cut the barrel of the marker by the difference in pressure between the CO2 from a tank attached to the marker which builds up ass the ball and the air in front of the ball. There are several other forces which act on the paintball besides the air resistance and the CO2. One is the friction of the ball against the barrel. This frictional force is in no way constant because the shape and the smoothness of the inside of the barrel is not of all time constant. Likewise, the surface of the paintball is not always smooth. A second force is A spinning force that the C02 imparts on the ball causing a rotational acceleration and also a gyre motion. once the ball has cleared the barrel in that location is a significant change in the forces that are acting on the paintball. The imbalance of the pressure behind the ball is gone. So that there is no longer any force pushing the ball in the direction that the muzzle is pointing in.It should be noted that there are many different ways that are employed to get a marker to shoot a paintball out of the marker. Nearly every dirt of marker has a different firing system. All have several things in common. They all have some sort of tank with compressed air or C02 or Nitrogen. Then they usually have sort of bolt and hammer system which is cocked back and held in place by a melanize which compresses a spring. When the trigger is pulled it releases the sear. The restoring force of the spring pushes the bolt and the hammer forward starting the paintball moving then the C02 is released propelling the ball outward.The flight of a Paintball Once a paintball gets into the air its flight is much like t hat of a golf ball. There are a verity of forces that act upon the ball once its in the air. The ball always has the force of gravity acting on it. This causes the paintball to travel in an arc and return to the earth.

Feminism in Antigone and A Doll’s House Essay -- Literary Analysis, So

Eleanor Roosevelt once said, A wo military man is like a tea bag. Its only when shes in hot water that you realize how operose she is. This is very evident in both Antig superstar and a Dolls dwelling. Antigone is a Greek play by Sophocles about a young daughter who decides to take on the task of burying her traitorous brother to honor the gods even though her tyrannical uncle Creon has out righted the burial. A Dolls House by Ibsen follows Nora Helmer, a housewife who has borrowed money without her husbands knowledge or consent for the purpose of taking him to Italy for medical reasons. It outlines the internal and external conflicts she experiences in the final days of her secret. It is important to understand the roles of women in both plays because during the time periods they were written, women were held to very different standards and were far more oppressed than men. There are many another(prenominal) spokespersons of nonconformity of women in Antigone and A Dolls Hous e in the ways that the main characters rebel against what is expected of women. Nora and Antigone are headstrong, sharp-witted, and willing to break the law for love, three character traits that were uncommon and almost frowned upon by society for women in history. Nora and Antigone were both very headstrong women. During the time periods of both plays, women were expected to be implemental and share the same opinions as their husbands. The two lead women in the plays show their obstinacy and ability to take care of themselves in many instances. One example in Antigones story is when she says (to her stereotypical woman sister) of her plan to bury Polynices, He is my brother anddeny it as you willyour brother too. No one will ever convict me as a traitor, (Sophocles 18). She then goes on to... ...use she knows that she will be following the gods law and honoring her own flesh and blood line by burying Polynices. All in all, the women in the plays go against the rules and practic es of society so that they can do something for the ones that are close to them. On the whole, Nora Helmer and Antigone for sure raise that women have the ability to do anything a man can do, just as well. The roles of women in Antigone and A Dolls House are certainly different than the roles of men, and the two main women in both plays transcend the expectations and beliefs of what women can and cannot do. They prove this in several ways, including the fact that they were determined, very intelligent and clever, and wiling to break the laws of man for loved ones. Antigone and A Dolls House are great works of classic literature that portray women as strong and intelligent beings.

Nigger: Historical and Current Use Essay -- Language History Discourse

Nigger Historical and Current UseNigger it is arguably the most consequential social insult in American History, though, at the same time, a word that reminds us of the ironies and dilemmas, tragedies and glories of the American experience (Kennedy 1).Harvard Law professor Rand any Kennedys book Nigger The Strange Career of a difficult Word is at the center of debate because of its controversy. It addresses questions among a diverse audience of students and scholars of all racial and ethnic backgrounds in its quest to discover how and why the word should or should not be used in modern day America.As a black American male, the word ringtail conjures up within me hate, hostility, violence, oppression, and a very shameful and unfortunate part of American History. The word symbolizes the aeonian chains of a bulk plagued with hate and bondage simply because of skin color. For many black people, including myself, nigger is the most pejorative word in the side language. Even when comp ared to racial slurs like kike, honkey, cracker, wet back, spic, jungle bunny, pod, tarbaby, and white trash, nigger is noted as the worst insult in the slope language. The word nigger suggests that black people are second class citizens, ignorant and less than human. While many blacks and whites agree that the word should not be censored from the English language, it certainly should not be used by all people because of its historical significance. For example, black militants believe whites should never use the word nigger. On the former(a) hand, the word nigger has been reclaimed by black youths particularly in the hip-hop culture. These modern day teens claim that it is just a word and that people give words meaning rathe... ...f NationalAssociation of Black Journalist. (1999). Fall 1999. .Eastwood, Lauren. Personal Interview. 10 April. 2002. Glory. .Dir. Edward Zwick. Perf. Man Broderick, Morgan Freeman, Denzel Washington, CaryElwes, Andre Brausher. Tri Star, I989.Kennedy, Ra ndall. Nigger The Strange Career of a Troublesome Word. New York Pantheon takes, 2002.Naylor, Gloria. Mommy What Does Nigger Mean? New York Times. 20 Feb. 1986. Pilgrim, David. Jim Crow Museum of Racist Memoribilia. Fall 2002..Saxon, Shani. VIBE Magazine. Fall 2002. .Thomas, Alex. Fall 2002. .White, Jackie. Dealing with the N-Word. Time Magazine. 2I Jan. 2002. Wickham, Dewayne. Book Fails to Strip Meaning of N Word. USA Today. 2 Feb.2002.

Nuclear Warfare :: essays research papers fc

Nuclear Power Problems The effects caused by a atomic power accident, on the scale of the April 26, 1986 Chernobyl accident, must override any inclination to incline with advocates for atomic power. Su depone we have all heard the expression "Im only human". If we are indeed only human, and consequently inclined(predicate) to error, we could never perfectly manage and contain an energy as potentially destructive as that of nuclear power, without the possibility of a nuclear accident. Furthermore, the wastes generated by nuclear power, when inadvertently released during a nuclear power accident, have been proven to cause malignant diseases and premature death to those who come into contact with them. Additionally, the vegetation threat we rely on for survival is severely affected when radioactive elements are released into the air and water supply during a nuclear accident. Most alarming, however, is the fact that the general open is vastly unaware of its governments us e of nuclear waste in the development of nuclear weapon. Most of us can remember the bombing of Iwo Jima and the effects the bomb had on the lives of the millions of Japanese that lived within a twenty mile radius of the city. We can see what happened to the second generation children born with severe informities much(prenominal) as sixteen fingers and three arms children born with cancer and children with mental and physical handicaps. The radiation of a bomb doesnt always cause indorsement death, but it is a lingering experience. Japanese people, thought to be healthy, got cancer in later life, and had dis-formed children. Consequently, we must not be swayed by advocates urging us to further develop and expand nuclear power. We must, instead, examine the larger picture the risks associated with this potentially devastating power. The potential for human error causing a nuclear accident can be ascertained by considering the causes and effects of accidents that have already occurr ed. In 1952, at Chalk Rivers Nuclear Reactor, four checker pads were unintentionally removed, causing a partial melt downwardly of the reactors core. In 1957, a fire at the Windscale Pile No. 1 plant, sightly north of Liverpool, England, resulted in the contamination of 200 square miles of countryside when it was covered with radiation. In 1976, the core of the Lubmin nuclear plant in Greifswald, East Germany nearly melted down when safety systems failed during a fire. In 1979, the ever so famous, Three Mile Island reactor in Harrisburg, Pennsylvania lost coolant in one of its two reactors and a partial meltdown occurred on March 28, 1979.

Presonal Writing: My First Impression Of My Teacher Miss Vicki :: essays research papers

Presonal Writing My First Impression of My Teacher Miss VickiMy first impression of Miss Vicki was a exceedingly authorative figuretowering over me. Her voice boomed and the earth shook whenever she marched. Sheseemed like such an unapproachable and distant person. That was in the firstyear of High School. She was my writings teacher then.During my first year in school, she struck terror in my heart. Andeveryone elses of course. The mere mention of her name made the most unrulyclasses silent. The birds stopped screeching. hitherto the earth felt still. Theomniscent presence of rumours stating that she didnt like Junior High studentswas not much of a help.Nevertheless, the 2 years of Junior High passed by sooner quickly. Soon,I was promoted to Senior High class. I had worked hard and gotten the subjectcombination that I wished for. Together with a bunch of old friends, I soon settled down in class comfortably.As fate would have it, she was fortunate enough to be my form teachertha t year. I almost choked in alarm when I heard the news. This time round,however, I resolved not to cower in terror whenever she was near. I decided toface the fact that we were red ink to meet each different for the next 365 days.Instead of trying too hard to lick her boots, I tried my best to be my natural ego in front of her.Still, I could not shake off the ice-cold image that she possessed in myheart. True, her corney jokes sometimes sent me into frolicking laughter, yet atother times these jokes simply fell flat the moment she uttered them. My lovelyclass, however was always ready to laugh at the right time and bug out of heramusing stories. Afterall, we would not want to run the risk of her tempererupting in front of us like Mount Saint Helens spewing molten rock and

Presonal Writing: My First Impression Of My Teacher Miss Vicki :: essays research papers

Presonal Writing My First Impression of My Teacher Miss VickiMy graduation impression of Miss Vicki was a highly authorative figuretowering over me. Her voice boomed and the earth shook whenever she marched. Sheseemed like such an unapproachable and distant person. That was in the firstyear of High School. She was my Literature teacher then.During my first year in school, she struck terror in my heart. Andeveryone elses of course. The mere mention of her name do the most unrulyclasses silent. The birds stopped screeching. Even the earth felt still. Theomniscent presence of rumours stating that she didnt like Junior High studentswas not much of a help.Nevertheless, the 2 historic period of Junior High passed by rather quickly. Soon,I was promoted to Senior High class. I had worked hard and gotten the subjectcombination that I wished for. Together with a ball of old friends, I soonsettled down in class comfortably.As fate would have it, she was fortunate enough to be my form teach erthat year. I almost choked in alarm when I heard the news. This time round,however, I resolved not to cower in terror whenever she was near. I decided toface the fact that we were going to meet each other for the next 365 days.Instead of trying too hard to lick her boots, I tested my best to be my naturalself in front of her.Still, I could not shake off the ice-cold image that she possessed in myheart. True, her corney jokes sometimes sent me into frolicking jocularityter, yet atother times these jokes simply fell flat the moment she uttered them. My lovelyclass, however was always ready to laugh at the right time and place of heramusing stories. Afterall, we would not want to run the risk of her tempererupting in front of us like stand up Saint Helens spewing molten rock and