This website uses cookies to ensure you have the best experience. Learn more

Black Holes: What They Are And Do

2417 words - 10 pages

Geologist John Mitchell is credited with first devising the idea of a black hole. He said that if some force could compress the sun down to an small enough size, it would have a gravitational field so strong, that one would need to be going faster than the speed of light to escape it (UTFC). All objects in the universe have what is called a schwarzschild radius. An object’s schwarzschild radius is the radius that an object would have to be compressed into in order to have an escape velocity greater than that of the speed of light, or a black hole. (VSBH). Using the earth as an example, if the entire earth was compressed to the size of a peanut, it would become a black hole (VSBH). Earth ...view middle of the document...

When this happens, the nebula begins to contract under its own gravitational pull. This forms a large ball of gas about sixty million miles across called a protostar which is basically a baby star. The protostar continues to contract under under its own gravitational pull until the protostar becomes hot enough and has a high enough gravitational pull to cause some elements inside the star, mostly hydrogen because it is the smallest, to combine and form larger elements. This process is called nuclear fusion and releases energy which counteracts gravity’s compression of the protostar. The more the protostar compresses, the more fusion takes place which releases more energy. Eventually the outwards pressure from nuclear fusion equalizes the inwards force of gravity and the protostar stops contracting. It is now a main sequence star, or a normal star such as our sun (LTQ).
Nuclear fusion plays an important role in the formation of black holes. As explained before, nuclear fusion is the process by which through high pressure and temperature, small elements such as hydrogen are combined to form a larger element. Elements are defined by the number of protons in their nucleus. When nuclear fusion
combines hydrogen, which has one proton in its nucleus with another hydrogen, the nuclei are combined and an element with two protons in its nucleus, helium, is created. Helium can combine with other elements to create larger elements and so on but hydrogen is the easiest to fuse because it is the smallest, so it is always fused first. In the core of a star, millions of tons of hydrogen are being converted to helium every second which released radiation energy. This reaction is exothermic and is what makes stars shine and provides heat to our planet. (UTFC).
Later on in a stars life, it will start to run out of hydrogen. When this happens, start to form helium together to form lithium and beryllium. Once the star runs out of helium it will start fusing the next element in the periodic table. This process continues for as long as the star is able to keep the fusion going, that is, it emits enough energy to keep the force of gravity at bay (UTFC).
Once stars like our sun run out of hydrogen, they switch to helium, then to carbon, then to oxygen. Once they reach oxygen, the star can not go on to any larger elements. When the star runs out of hydrogen, it starts to collapse under the weight of gravity and heat up. This causes the outer layers of the star to expand forming a red giant. The star then becomes hot enough to fuse helium into carbon and nuclear fusion resumes (HSWIS). This process continues and repeats up to oxygen, which the star is not large enough to fuse. Because of the exothermic reaction of nuclear fusion is gone, the star’s outer layers are thrown off and core collapses into what is called a white dwarf (UTFC). A white dwarf is a small ball of matter that is very hot and very dense. They can have a temperature of over one hundred thousand...

Find Another Essay On Black Holes: What They Are and Do

Who are the Green Consumers, and What do they want?

1504 words - 6 pages - -WHO IS THE GREEN CONSUMER, AND WHAT DOES HE/SHE WANT?PurposeGreen marketing is one of the hottest trends being used by marketers these days. In 1989 it barely existed, but by 1990 it was all the rage (1, 25). In the past decade, Americans have displayed an increasing concern for the environment as they begin to realize it is slowly deteriorating. More than seventy percent of the 180 million tons of trash disposed each year in the United

Trojans,Worms, and Viruses: What Are They and What Can You Do to Stop Them

2339 words - 10 pages in the battle of Troy. This was a mythical battle that some people say never happened. Basically, Troy got in a war with another Greek city-state and the enemies built a giant wooden horse and the Trojans brought it in due to them thinking it was a gift. A Trojan virus works similarly and so the name was given (Trojan horse). So far, all that was explained was what Trojans are and what they do. But worms are nothing to forget about. Worms are a

Leadership Style: What do People Do when they are leading?

1796 words - 8 pages Values which are the cornerstone of who they are and what they stand for (The DuPont Oval Logo, 2013). 1. “Safety and Health – adhering to the highest standards to ensure the safety and health of our employees, our customers and the people of the communities in which we operate; 2. “Environmental Stewardship – protecting the environment and strengthening our businesses by making environmental issues an integral part of all business activities

What are dreams? And do they affect us in a good way or a bad way

1170 words - 5 pages Every time a black cat crosses someone’s path, it is considered a form of bad luck. It is assumed that one should have taken a different path to avoid this. This is also a form of a superstition and is usually heard from many superstitious characters. Superstitions are used to provoke a character into believing something that is really not possible, as do dreams. Although, ‘dream’ and ‘superstition’ are two separate

What are parental rights and how do they apply in specific family law situations?

3015 words - 12 pages I.Introduction of topic: What are parental rights and how do they apply in specific family law situations?II.Definition of termsA.Pro PerB.Sole legal custodyC.Joint legal custodyD.Primary physical custodyE.VisitationF.Child custody proceedingIII.Options available for Family Court representationA. Retain an attorney1.Advantage: Attorney understands rights and rules of the court; Speaks on behalf of the parent in court2.Disadvantage: Costly legal

Are ODD and CD real? and How/Do they differ?

969 words - 4 pages , abuse alcohol and drugs, have low self-esteem and are easily irritable. The diagnosed people often have trouble with realizing what they are doing is wrong and that their behaviors can endanger others. Stephen M.R. Covey quotes “We judge ourselves by our intentions and others by their behavior.” People with ODD and CD generally have different intentions to their actions yet others and them their self may not or cannot grasp and understand why some

Cults. This essay tell about cults in north america, it tell us how they are formed and what they do. It also tell us about social interaction

2054 words - 8 pages ,people who have moved to new cities for jobs, those who havejust been divorced or widowed. Usually individuals 16 to 25 or35 to 40. The vast majority of members are merely looking fora sense of community and belonging, during a difficult time intheir lives.2Cults provide an ersatz social unit, which takes them in, nurtures themand reinforces the cult's worldview. By the time that most cult membersrealize that this cult isn't what they had expected

Hate Crimes - This essay is about what hate crimes are, how often they happen, and what we can do to help prevent them

779 words - 3 pages actions are wrong. Sometimes drugs and alcohol help initiate these crimes, but the main factor appears to be personal prejudice. Personal prejudice is what blinds a person from seeing the wrong in what they are doing. Most times this prejudice comes from an environment that sees differences as threats. The worst hate crimes are often committed by people with a history of antisocial behavior. One of these examples took place in June of 1998 in

What options do managers have in such conditions when they are negotiating with employees?

2094 words - 8 pages Essay topic: Many countries are currently experiencing an economic downturn. Poor economic conditions are said to give more power to managers when they negotiate with their employees. What options do managers have in such conditions when they are negotiating with employees? Which of these options do you feel align most closely to the strategic view of how employers manage labour?The global financial crisis has resulted in deteriorating market

In Scene Three Blanche meets Mitch and witnesses turbulent passion. What are the similarities between Blanche and Mitch and do they have any future prospects together?

1204 words - 5 pages From the moment that Mitch and Blanche are introduced, it is clear to the audience that they have a 'certain interest' in one another. Immediately previous to their meeting, Mitch talks of his 'sick mother'. This reveals a sensitive side to his character, which contrasts with the vulgarity and coarseness of his peers. Blanche has clearly been unimpressed by the manners of Stanley and his other friends, which hints that she will like Mitch rather

Expert Witness Describe what an expert witness is. What do they add to the court room? Why are they important? This is a very good essay for Psychology and Law classes. It is detailed and well...

1461 words - 6 pages able to give an opinion on the case they are asked to study, which is known as expert advice. A forensic witness who is an expert in court has a number of roles to cover. They must review all the evidence given on the case, analyze the information and come to an unbiased conclusion, provide an opinion regarding the subject manner, and clarify the complex subject to the jury so they can easily comprehend it. Lawyers are not always certain if

Similar Essays

Historically Black Colleges ...What They Are About And What Puposes Do They Serve

1258 words - 5 pages medical schools. Many of the alumni are well known from schools such as Morehouse, such as civil rights activist Marin Luther King Jr., Olympic athlete Edwin Moses, and film maker Spike Lee. The list goes on and on from the other HBCUs as these people alone, make a clear statement that these schools are necessary, and they do produce good strong African-American Leaders. On the controversy, raising money remains the biggest challenge. Black College

Synthesizers: What Are They And What Do They Do?

954 words - 4 pages understand them. What is a Synthesizer? A Synthesizer is a “musical instrument that is capable of producing a wide range of different sounds” (Russ 4) from “simple resources” (430). There are two main types of synthesizers: analogue and digital. Analogue synths use “voltages and currents directly represent both audio signals and any control signals” (71). Digital synths are number based, they use “numbers to represent the audio and control

Hackers Who Are They? And What Do They Do?

989 words - 4 pages minute. You are able to see the hacker bypassing passwords and initiating viruses and it seems absolutely amazing. In real life, hackers do not work this way. They are not like you see them on television. Hackers use programs that are highly accessible over the Internet. Anyone can download programs and use them as they please. The only thing a person has to do is connect to the Internet and type in what they are searching for at a search engine

What Are Unions And What Do They Do

1538 words - 6 pages Running Head: ASSIGNMENT FOUROntario CanadaAPA StyleWhat are Unions and What do They DoTo understand the need for unions firstly we need to understand the nature of capitalism. Black does an excellent job of summing up what capitalism truly stands for, and what we need to remember, no matter how wonderful capitalism may appear to be: Black does this in his writing, "The raison d'être of these capitalist firms is not to meet human needs