Stars and Black Holes Essay -- essays research papers

Below you will read research on stars and black holes. Black holes are stars whose core has been crushed by gravity. In the text to follow you will see how a star forms, read about its life and how it becomes a black hole. Stars are composed of hydrogen gas and dust. Stars owe their existence to the force of gravity. Stars are created from the thinly spread atoms of dust and gas that swirl throughout space. The atoms clump together into dense clouds that eventually collapse under their own gravity. Other forces counteract the gravity. The dust and cloud grows steadily hotter until a nuclear furnace ignites creating a bright shining star. (Couper H. & Henbest N., 1996). Stars are born when particles of hydrogen, helium and dust combine and collapse, shrinking and falling into itself making the cloud hotter. Tiny protons bump into each other and bounce away at high speeds stick together when it is hot enough. Four protons form a particle of helium gas. Two protons fuse together becoming neutrons. Matter that is released from this fusion turns into energy streaming outward from the core creating nuclear fusion. Once the inward and outward forces are equal it reaches its final size and shines, becoming a star. The length of the hydrogen burning stage depends on the stars weight. A star with 15 times the weight of the sun uses up all its hydrogen in less than 10 million years. (Darling D., 1985) The farthest star in the most distant galaxy is more than ten billion light years away. The kind of star a star becomes depends on how much gas and dust the protostar manages to pack into itself as it forms. The more mass a star collects the hotter and brighter it becomes. (Gallant R ., 2000). Three major star types are red dwarfs, yellow dwarfs and blue giants. Red dwarfs are the dimmest and have the longest life span that is about a trillion years. Red dwarfs become black dwarfs when they exhaust their hydrogen and fuel. Yellow dwarf stars have shorter life spans because they burn their hydrogen fuel faster. As fuel runs low they swell up into a red giant, then release planetary nebula, then shrink into white dwarfs and finally cool as black dwarfs. The massive blue giants have the shortest life span as they’ll swell up into supergiants, explode as a supernova and end up as either a neutron star or black hole. (Gallant R ., 2000). A norm... ...un is a ball of gas. It is 8 and one third light years away and 93 million miles away. The suns diameter is 865,000 miles. The sun is about 5 billion years old. (Darling D., 1985). The sun appears as a large disk. At the top of the sun you can see two huge gas eruptions called prominences. These prominences leap out hundreds of thousands of miles. They have hair like spikes that are surges of hot gas called spicules. The mottled effect is caused by cells of hot gases welling up from beneath the surface, cooling and appearing darker than the surrounding gases. (Gallant R ., 2000). Therefore, the sun, stars and black holes coexist with one another in the solar system along with other matter in the galaxy. The sun is a star. Black holes are collapsed stars. Each does not exist without the other. References Couper H. & Henbest N. (1996). Black Holes. New York, NY: DK Publishing Inc. Darling D. (1985). The Stars from birth to black hole. Minneapolis, Minnesota: Dillon Press Inc. Gallant R . (2000). The life stories of Stars. Tarrytown, New York: Benchmark Books Sipiera P. (1997). Black Holes. Canada: Children’s Press, Grolier Publishing Co. Inc

Macbeth: A Tragic Hero

There is much debate to whether Macbeth is a villain or hero, but it truly is clear that Macbeth is a tragic hero based on that he has the fatal flaw of having too much ambition, he was doomed to make a serious error in judgment which was killing Duncan, and that he suffered greatly in order to accomplish what he believed was right. Macbeth’s flaw of his extreme ambition is demonstrated by how he kills Duncan, how he kills Banquo, and how he kills MacDuff’s family.He was doomed to make the serious judgment error that was killing Duncan, and he was condemned to do this because the witches prophesized it, his wife wanted him to, and he was unnaturally guided by a dagger to kill Duncan. Also he went through the death of his friends at his own hand and the death of his wife to achieve what he wanted to, and was willing to suffer for it. Macbeth showed that he had a fatal flaw, which was that his ambition was what mainly factored his decisions.This is shown when he killed th e King in his quest for power, when he killed his friend Banquo, and when he killed the wife and child of MacDuff. Early in the play Macbeth was told that he would become King of Scotland, and that really put the gears in motion for the terrible decisions he would make throughout the play. His first one was to kill Duncan, who was not only the King whom he had loyally served for a long time, but also his own cousin. He killed his own flesh and blood in order to get the opportunity to gain power.He figured that if he killed Duncan he would have a chance at being king, and he acted upon that thought. This thought process is shown in the quote, â€Å"If good, why do I yield to that suggestion whose horrid image doth unfix my hair and make my seated heart knock at my ribs, against the use of nature? Present fears are less than horrible imaginings: My thought, whose murder yet is but fantastical, shakes so my single state of man that function is smother'd in surmise, and nothing is but what is not. † (Act1, Scene3).This showed that he knew what a terrible deed he would be doing, but that couldn’t stop his need to become king. Also, Macbeth killed his dear friend Banquo and even attempted to kill Fleance, Banquo’s son, in order to keep the throne. The witches prophesized that Fleance would become king, and Macbeth decided that he had already done so much to become king that there was no point in letting the throne leave him so soon, and that is shown in the quote, â€Å"I am in blood, stepped in so far that should I wade no more, Returning were as tedious as go'oer† (Act3, Scene4).He decided that he had already hit the point of no return and acted accordingly. Finally, the fact that he killed the wife and child of his enemy MacDuff, proved that Macbeth was willing to cross any line to keep his spot as king, and would let nothing stand in the way of his ambition. The quote, â€Å"The castle of Macduff I will surprise; Seize upon Fife; giv e to the edge o' the sword his wife, his babes, and all unfortunate souls that trace him in his line. † (Act4, Scene1), shows that Macbeth was willing to kill an innocent family to prove that he was not ready to be defeated.Basically Macbeth showed that his fatal flaw was too much ambition, and that was demonstrated through him killing Duncan, killing Banquo, and killing the family of MacDuff. Macbeth appeared to be destined to make the serious judgment error that was killing Duncan because when you take his ambition as talked about above, and that he was told by witches that it was his future to be king, that his wife thought it was the right thing to do, and that he even had hallucinations pointing towards killing him, it seemed like he had no other choice.First off, Macbeth was approached by witches who told him that he would become king of Scotland and that intrigued him very much, especially with his crazy ambition. He took this to heart and because he wanted to become ki ng and he now thought it was in the realm of possibility, yet he knew it would not happen legally, he was really left with just one option. This was despite that at the time he knew it wasn’t the right thing to do. This is shown by the quote, â€Å"All hail, Macbeth, thou shalt be king hereafter! † (Act1, Scene3).This was just the beginning of the seed that would grow in Macbeth that eventually culminated into a plant of terrible things. Next, Lady Macbeth also influenced Macbeth, and that was presented in the quote, â€Å"Glamis thou art, and Cawdor; and shalt be what thou art promised: yet do I fear thy nature; It is too full o' the milk of human kindness to catch the nearest way: thou wouldst be great; Art not without ambition, but without the illness should attend it. † (Act1, Scene5). This just showed how Lady Macbeth reacted to the situation as though killing Duncan was the right thing to do and that Macbeth would be greatly benefited from it.Lastly, Macbe th was influenced by a hallucination of a blood stained dagger that was meant to be stained by the blood of Duncan. One night Macbeth saw the dagger and didn’t know whether it was real or fake, and what to do with it, but then it became clear in the quote, â€Å"Is this a dagger which I see before me, the handle toward my hand? Come, let me clutch thee†¦ †¦ I go, and it is done; the bell invites me. Hear it not, Duncan; for it is a knell hat summons thee to heaven or to hell. † (Act2, Scene2) This showed how Macbeth was basically shown the way to murdering Duncan by the dagger.And from being influenced by the witches, his wife, and the dagger, it was obviously meant to be that Macbeth was going to make a serious judgment of error in killing Duncan. A tragic hero must have a capacity for suffering, and suffer because he believes in what he is doing, and because he feels both guilt and guiltlessness. Macbeth in my mind does fit into this category through all th e pain and suffering he experiences throughout the play after he murders Duncan. A quote that shows he is suffering is â€Å"Will all great Neptune’s ocean wash this blood clean from my hand?No, this my hand will rather turn the multitudinous seas incarnadine, making the green one red. † (Act 2, Scene2). Macbeth is just realizing that what he has done is irreversible and he will never be able to get it off of his conscious. He therefore must have the capacity for suffering, and though there are many moments when he is unsure, I believe that he truly believes in what he is doing. There are also times when Macbeth feels guilt over the act he has committed and he is never really able to shake these feelings off, but he still gladly takes over as king and moves on in life, therefore showing he feels both guilt and guiltlessness.Again, the point is now raised that yes, he believes in what he is doing, but what he is doing is a terrible thing, and how does this make him a he ro? I believe that while Macbeth isn’t your typical hero, whether his actions were right or wrong he still meets the criteria, and it is on that that I’m basing the decision. Overall, it was clear in the story that Macbeth was definitely a tragic hero. He displayed his fatal flaw that was his insane ambition, he was destined to make the disastrous make of killing Duncan, and that he is  willing so suffer to achieve what he believes is right.Macbeth showed his ambition through killing Duncan, killing Banquo, and killing Macduff’s wife and child. His serious error in judgment of killing the king was always meant to happen because three witches gave him the thought, his wife wanted him to do it, and his hallucination even pointed him towards it. To sum it up, the debate over whether Macbeth is a hero or villain should be put to rest because it is quite evident that Macbeth is a tragic, tragic hero.

Critical Pathway Hyperthyroidism. - 840 Words

Critical Pathway: Hyperthyroidism Introduction Mrs. J.P. is a 30-year-old African-American female who presents to the local health department for her annual women’s health exam and establishment of primary care. Mrs. J.P. requests that pregnancy testing be performed due to her recent absence of menses. Mrs. J.P. states she and her spouse have been attempting pregnancy for some time; however, with each missed cycle, pregnancy tests have been negative despite corresponding notable fatigue. Mrs. J.P. explains her current uninsured status and frustration with walk-in clinics stating recent use of multiple clinics for â€Å"simple things† without resolution. Mrs. J.P. lists her primary complaint as difficulty sleeping due to significant heart†¦show more content†¦Mrs. J.P. appears very irritable as initial assessments are completed requesting the clinic door be propped open and that the visit is expedited as her heat intolerance and inability to remain stationary for long periods are difficult to overcome. A ctive diaphoresis is noted as she fumbles through papers scattered throughout her belongings. As vitals and were needed, Mrs. J was advised to report to intake for objective assessments. After great difficulty, rising from the clinic chair, Mrs. J.P. reports to the lab with the following vital signs: Height: 5 feet 8 inches Weight: 165 pounds Body Mass Index (BMI): 25.08 Blood pressure (BP): Heart Rate (HR): 120 Respirations: 17 Temperature: 98.9 Physical assessment reveals intermittent heart palpitations with strong carotid and radial pulses, brisk deep tendon reflexes, 1+ non-pitting edema of bilateral ankles, hair thinning, onycholysis, orbital lid lag and an enlarged neck with positive audible bruit. Mrs. J.P. denies pain upon palpation of neck as slight thyroid enlargement is noted. Orders to perform complete blood count (CBC), complete metabolic panel (CMP), thyroid stimulating hormone (TSH), thyroxine index, free (T4), triiodothyroine (T3), and pregnancy test result in abnormal values including: Hemoglobin (Hgb): 11.0 g/dl TSH: 0.5 mU/L Free, T4: 5.0 ng/dl T3: