Buoyancy of an Orange: Analysis

Buoyancy of an Orange: Analysis Joseph Wong Brendan Mullins Nathan Shoemaker Mike Dorazio Abdul Aldualeg Guillermo Venancio Buoyancy is the upward force from the water needed to stay afloat. Since pressure increases with depth, there is a higher pressure and the bottom of the volume of fluid than the top. The pressure difference results in a net force that will accelerate an object upward. The magnitude of the force is proportional to the pressure difference and is equal to the weight of the displaced fluid, which is a property explained in Archimedes’ Principle. The first person to realize a concept that related to buoyant forces was Archimedes. Archimedes stated the basic concept of buoyant forces in his famous Archimedes’ Principle, which states that the weight of the fluid that anybody displaces when submerged either partially or fully, is equal to the buoyant force exerted on said body. This buoyant force is what allows any object to float on the surface of any liquid as long as the buoyant force is large enough of counter the weight of the object; otherwise, it will sink. A good example of this principle is a floating aircraft carrier. Although the ship is made out of heavy steel, it is constructed so that there is a large amount of open space in it to stay afloat. In addition, what determines whether the object is heavier than the buoyant force is its density. Density, by definition, is the mass of the object per unit volume that the object takes up and is denoted by the Greek letter Ï  (rho). Since the buoyant force is equal to the weight of the water displaced by the object, if the submerged object is denser than the water, it will sink because it has a greater weight than the water displaced. In this experiment, we test this theory buy using a common orange. One can think of the peel of an orange like a life jacket that might keep you afloat while in the river. The density indicates how close the atoms of the object are packed together. In the case of an orange, the atoms of the peel are not packed near as closely as the actual fruit, causing it to float when the unpeeled orange is placed in the water. This project involves two oranges, weighing approximately 0.49 pounds each. When dropped in water, it can be observed that both oranges float when they are unpeeled. In an orange, the peel is a spongy material and has tiny pockets of air, which makes the density of orange less than the density of the water, in turn, causing it to float. When the second orange is peeled and dropped in water, it sinks to the bottom of the container. This simple experiment is a great way to demonstrate buoyancy and density. The orange is enclosed in a porous rind, which has a spongy look and feel and contains air pockets, which help to provide buoyancy to the floating orange. When the unpeeled orange is put into the water then the air pockets of the rind fill themselves with air, the submerged orange is activated as a life jacket, the orange is saved from drowning into the water, and it floats on the surface. The similar concept is used in the life jackets, which help the humans to stay afloat in the waters. All the people riding on the boats or travelling in the sea are educated and advised to have a Personal Floating Device (PFD) with them so that in case of emergencies they can be save d from any kind of mishap. It is very interesting to note here that most of the deaths that occur on the waters are not far away from the shore but they occur quite near the shore, on the inland waters within a radius of about a 50 m from the shore due to the sheer negligence of the swimmers because of their insistence on not wearing a life jacket. The thing to note here is that the efficiency and the coverage of the state on the waters is so amazing that the state does not allow any passenger on the waters to stay on board without a life jacket. There is an exemption to the passengers if they are staying in the cabin or any other closed place on a boat. The state offers a guidebook for the travelers and the passengers on the waters and it clearly states and advises the presence and wearing life jackets so no loss of any kind or any other harm can take place. So, what is in a life jacket that it has become a serious part of any passenger’s life that commences his trip on the waters? The life jacket provides the extra buoyancy needed for the person to stay afloat and save himself from drowning. The life jacket is filled with air on the inner side, which helps to control the relationship b/w the buoyant force and that of the person floating. It helps to carry the weight of the person floating above the water so that his or her weight does not become a serious concern and drowns the person. Gone are the times when one would have to wear inflated life jackets that were also heavy and bulky and were also a problem for the person to wear and be comfortable with it, with each passing day the scientists are very much concerned about the welfare and well-being of the people so they are developing new up to the mark jackets that are easy to wear, inflate themselves in water, are very comfortable with huge arm outlets to ease the movement in the waters. Nowadays one has to ensure the presence of different personal floating devices for different purposes i.e. for inland water use, for staying on board, for float purposes. The life jacket is not a fit for all object, it is to be chosen for people of different ages and sizes. It provides inflation according to the buoyant force needed for the person to stay afloat. One of the biggest advantages of having a life jacket is that it comes in shiny colors that are visible for the rescue staff and it is easier for them to save the drowning or in danger person. On board staff are advised to have some floating aid for the people drowning in the waters so that they can provide support to them in the hour of need and can save a human life with the instant aid. The state ensures that all the people must have some sort of floating aid and for that, the lifeguards as well as the coast guards are advised to ensure the usage of the life jackets and their presence on the boat. Caring about the life jacket is a very important part. The life jacket that is not in a good shape and is torn or have some cuts on it can be of great danger to the user as it can cause the drowning so the life jacket must be properly checked and it should be ensured that they work properly before someone takes a dive into the waters. The safety of the person depends a lot on the reliability of the device that is being employed to save the person from drowning. The basic thing needed for the proper use of the life jackets and their importance in saving the lives of many is conveying the proper education and information to the people on board and to those venturing the waters for any reason whatsoever. The lifeguards and the coast guards should give proper lessons to all the people around the waters. They should arrange a session for all the people that are new to the waters so that their lives can be saved by just a simple precaution of wearing a life jacket. It is easier to save so many just by educating them because every life matters. It can be summarized as the buoyant force generated in case of an orange residing on the surface of the water is basically given by the rind of the fruit which has air pockets and when the fruit is submerged into the water then air pockets are full and the necessary buoyant force is applicable to the weight of the orange and it stays afloat. Life jackets are a useful part of the people travelling on shore and it has to stay with them in the hour of need so that they can save themselves from any difficulty on staying above water or any other danger of drowning. There should be education concerning the proper use of the personal assistance device which helps is saving lives. In addition, the people associated with the business should be given proper instruction to ensure the use of the device. Sources: http://en.wikipedia.org/wiki/Buoyancy http://adventure.howstuffworks.com/outdoor-activities/water-sports/life-jacket1.htm http://www.ehow.com/info_12045878_science-projects-kids-floating-oranges.html

Vergil as the Greatest of all Latin Poets

Vergil is generally acknowledged as the greatest of all Latin poets. He was famous in his own lifetime and was the first poet in the history of Latin literature to be the subject of lectures given by a contemporary teacher. There seemed to be a great deal of interest in him and on his rare appearances in Rome he was pointed out in the streets as if he were a celebrity. However, in his private life he was know to be very shy and preferred the quiet countryside to the pandemonium of Rome. He was born as Publius Vergilius Maro in Andes, a small village, near Mantua (Mantova), Italy on October 15, 70 BC. He had two brothers; Silo, who died in his childhood, and Flaccus, who lived to be a young man. Vergil's father, a potter and cattle farmer, worked hard to provide his son with an Aristocratic education. After he completed his studies in Cremona and Milan, Vergil went to Rome to study law and rhetoric at Epidius' academy. It was in Rome that he met Gaius Maecenas, a Roman statesman and patron of the arts, who saw Vergil's promise of greatness and sponsored his education. In addition he developed a friendship with Octavian, who later became Emperor Augustus. While in Rome, he studied alongside many prominent poets including Gaius Cornelius Gallus, Horace, and Lucius Varius Rufus. After leaving Rome, Vergil went to Naples to study under Siro. Here, he studied philosophy and also became a member of a group of Epicurean thinkers outside Naples. This group gathered in Campania, at a retreat known as â€Å"the Garden†, under the leadership of Siro, Vergil's teacher and friend. Originally, Vergil wanted to study law but he gave up after pleading only one court case and devoted himself to philosophy and literature. He spent most of his life in the countryside of Campania, but kept a house on the Esquiline Hill in Rome, which was given to him by his friend and patron Maecenas. He wrote three major works in his lifetime. Early in his career he wrote the Ecologues, a book of 10 pastoral poems. This was followed by the Georgics, a didactic poem on farm life. His last and greatest work was the Aeneid, a mythological epic poem describing the seven-year wanderings of the hero Aeneas. Vergil's first major work was composed between 42 and 37 BC. This was a ten book pastoral poem know as the Eclogues or Bucolic. It was modeled on the Idylls of Theocritus, an Alexandrian poet. Vergil's emphasis is on graceful rhymes and the description of a romantic setting in northern Italy, but he also added many realistic details such as, his father's eviction from his farm due to political seizure. The most famous of The Ecolouges, The fourth celebrates the birth of a child who is destined to usher in a new Golden Age of peace and goodwill. Critics have made definite connections between Vergil's fictional characters and real people. Some have suggested that the divine birth refers to Mark Anthony, or possibly Vergil's friend Octavian, who became Augustus, Rome's first emperor. Still others see this divine birth as a reference to the birth of Christ. His next major work was the Georgics, or Art of Husbandry, which was written from 36 to 29 BC. It is a four-book poem that described the life of a farmer. Its inspiration is said to come from the Greek poet Hesiod's Works and Days. Vergil's position as the leading poet of the age was confirmed with the Georgics publication. The poem deals with planting, caring for orchards and vineyards, stock management, and beekeeping. However, the main emphasis is on the values of Roman life, particularly the work ethic. The poem was designed to be universal in scope with the topics of war, peace, death and resurrection concluding each book. Vergil devoted his last ten years to the composition of the Aeneid. This is his last and, by far, best known work. It was written between the years of 30 to 19 BC in twelve books. Modeled after Homer's epics, the Iliad and the Odessey, the Aeneid is a mythological epic describing the seven-year wanderings of the Roman hero Aeneas, from the fall of Troy to his military victory in Italy. Aeneas, while central to the story, is more symbolic than realistic. His character exists to tell the story of the founding of Rome and to personify the Roman values of duty and responsibility. In the story, Aeneas escaped from Troy carrying his father on his shoulders and leading his young son Ascanius by the hand. He brought together a fleet of Trojans and sailed the eastern Mediterranean Sea to Thrace, Crete, Epirus, and Sicily before being shipwrecked on the coast of Africa. Here Dido, the queen of Carthage, fell in love with Aeneas. The two began to live together as husband and wife and Aeneas intended to make Carthage his home. Jupiter, king of the gods, warned Aeneas that he must leave Dido in order to continue on his destined mission to found Rome. In despair, Dido killed herself when Aeneas departed for Italy. After landing at the mouth of the Tiber River in Italy, Aeneas killed Turnus, the king of the Rutulians, in a war for the hand of Lavinia, who was the princess of Latium. According to Vergil, the Romans were direct descendents of Ascanius, the founder of Alba Longa, the mother city of Rome. The Aeneid is usually considered the first great literary epic, unlike the Iliad, which in essence is a work of oral poetry. The Aeneid was written as a deliberate attempt to glorify Rome at the request of Augustus Ceasar. The historical elements are especially prominent in books five through eight, the central portion of the poem. The Aeneid became a classic in its own day. All of Rome, particularly the royal family, followed the progress of the epic. Vergil would read aloud from rough drafts of the Aeneid to Augustus, his sister, Octavia, and Maecenas. As he refined his work during his later years, the poet led a comfortable life, devoting himself to historical research. In 19 BC, Vergil set out on a trip to Greece and Asia with the intention of revising his masterpiece. In Athens, he met Augustus and unfortunately became very ill during his stay in Greece. Augustus escorted his friend back to Brundisium, Italy, where he died before his epic could be revised to his satisfaction. To prevent the Aeneid from being read in rough form, Vergil left instructions that it be destroyed. Augustus, realizing the value of this work, intervened before this request could be carried out and assigned two of Vergil's poet friends, Varius Rufus and Plotius Tucca, to edit the manuscript for publication. The work was completed near the end of 18 BC. It achieved immediate acceptance throughout the Mediterranean as the definitive Roman epic. On his deathbed, Vergil immortalized himself with a short epitaph, which his friends inscribed above his grave. It ends with this line: â€Å"I sang of pastures, farms and rulers†. This became a touching summary of his three great works.

The Boy in the Striped Pajamas Compare and Contrast

Night and Boy in the Striped Pajamas Comparison Night by Elie Wiesel and the movie The Boy in the Striped Pajamas show two extremely interesting perspectives towards the Holocaust. Night was a non-fiction novel written by a Jewish boy who was in an actual concentration camp. The Boy in the Striped Pajamas was a movie based off of a fiction novel written by John Boyne that tells the story of a Nazi soldier’s son named Bruno that befriends a Jewish boy he meets at a nearby concentration camp.Within the two stories, there were differences in perspective, mood, and overall message. Because Elie and Bruno come from very different origins, their perspective in the stories are very different. Being taken out of his home and put through the terrors of a concentration camp, Elie and the other Jews involved saw Nazis as extremely horrid people. The Nazi soldiers were the antagonists in Night. However, in The Boy in the Striped Pajamas, Bruno and the rest of his family were Germans, even his father was a Nazi soldier.Bruno and his family throughout most of the story had no idea what the Nazis were doing to the Jews; they saw the Nazis as people helping their country. Not until the end of the movie did the family realize the terrible things the Nazis were doing to the Jews. Movies provide things like mood and tone that words in a book just can’t provide. In Night, Elie attempts to present his voice through his writing. But, when you don’t have the senses of sight and sound, it is difficult to understand the mood the writer is trying to portray.In the Boy in the Striped Pajamas, through the cinematography, music, and tone of the actors’ voices, you can easily distinct what the mood was. I believe that Night and The Boy in the Striped Pajamas each had their own message to share, and their messages had both similarities and differences. Elie Wiesel wrote the book to tell people about the terrifying and horrific events that took place in his life an d to try to prevent anything like the Holocaust from happening again.The Boy in the Striped Pajamas showed the importance of friendship and it provided a perspective that many people hadn’t thought about before. Viewers were exposed to what many Germans went through in finding out what happened to the Jews. Night and The Boy in the Striped Pajamas show two extremely interesting perspectives towards the Holocaust when it came to perspective, mood, and final message. Even though they have their differences, they still provided a story that teach people about the tragedy that happened during the Holocaust and humbles those people.

Allelopathic Effect of Tree of Heaven on Radish Seed Free Essay Example, 2750 words

From the regression analysis, it is clear that the growth length of the root of the raddish seeds and the concentration of the toxins from the altissima are strongly negatively correlated. It is clear that the growth in root length is significantly affected by the concentration of toxins from the altissima (R2=0.93), P= p=0.001). As the concentration of the toxins produced by altissima increases, the rate of root length reduces significantly. It is observed that raddish seeds growth in root length is highest at the lowest concentration. However, the highest germination percentages were noted in a condition of distilled water and at low toxin concentration. Toxin concentration significantly caused a significant impact on the rate of growth in root length decreasing with the increasing concentration. At higher concentration, the rate of increase in root length in the raddish seeds was significantly lower relative to lower concentration. It is worth noting that seeds tend to recover, f ollowing their transfer from the concentrated environment to the distilled water. Final recovery percentages of germination in higher concentration treatments were found to be significantly higher as compared to the none-concentrated controls. We will write a custom essay sample on Allelopathic Effect of Tree of Heaven on Radish Seed or any topic specifically for you Only $17.96 $11.86/pageorder now This indicates that the exposure of the seeds to higher concentration tend to permanently inhibit root growth. It is also clear that the pH values of the aqueous extracts affect root growth. It was also observed that there was a strong correlation between the concentration of toxins from the altissima and germination. Statistically, it is observed that root growth is significantly affected by the concentration of altissima (R2=0.93), p=0.001). However, the highest rate of germination was noted in a condition of low concentration. Concentration significantly roots growth with the rate of root growth decreasing with the increasing concentration. At higher concentration, the root growth rate was significantly lower relative to lower concentration. Notably, seeds tend to recover well in terms of root growth, following their transfer from the altissima concentrated environment to the distilled water.