Black Holes Essays - Black Holes, Event Horizon, Rotating Black Hole

Black Holes Essays - Black Holes, Event Horizon, Rotating Black Hole Black Holes stence. The Search for Black Holes: Both As A Concept And An Understanding For ages people have been determined to explicate on everything. Our search for explanation rests only when there is a lack of questions. Our skies hold infinite quandaries, so the quest for answers will, as a result, also be infinite. Since its inception, Astronomy as a science speculated heavily upon discovery, and only came to concrete conclusions later with closer inspection. Aspects of the skies which at one time seemed like reasonable explanations are now laughed at as egotistical ventures. Time has shown that as better instrumentation was developed, more accurate understanding was attained. Now it seems, as we advance on scientific frontiers, the new quest of the heavens is to find and explain the phenomenom known as a black hole. The goal of this paper is to explain how the concept of a black hole came about, and give some insight on how black holes are formed and might be tracked down in our more technologically advanced future. Gaining an understanding of a black hole allows for a greater understanding of the concept of spacetime and maybe give us a grasp of both science fiction and science fact. Hopefully, all the clarification will come by the close of this essay. A black hole is probably one of the most misunderstood ideas among people outside of the astronomical and physical communities. Before an understanding of how it is formed can take place, a bit of an introduction to stars is necessary. This will shed light (no pun intended) on the black hole philosophy. A star is an enormous fire ball, fueled by a nuclear reaction at its core which produces massive amounts of heat and pressure. It is formed when two or more enormous gaseous clouds come together which forms the core, and as an aftereffect the conversion, due to that impact, of huge amounts of energy from the two clouds. The clouds come together with a great enough force, that a nuclear reaction ensues. This type of energy is created by fusion wherein the atoms are forced together to form a new one. In turn, heat in excess of millions of degrees farenheit are produced. This activity goes on for eons until the point at which the nuclear fuel is exhausted. Here is where things get interesting. For the entire life of the star, the nuclear reaction at its core produced an enormous outward force. Interestingly enough, an exactly equal force, namely gravity, was pushing inward toward the center. The equilibrium of the two forces allowed the star to maintain its shape and not break away nor collapse. Eventually, the fuel for the star runs out, and it this point, the outward force is overpowered by the gravitational force, and the object caves in on itself. This is a gigantic implosion. Depending on the original and final mass of the star, several things might occur. A usual result of such an implosion is a star known as a white dwarf. This star has been pressed together to form a much more massive object. It is said that a teaspoon of matter off a white dwarf would weigh 2-4 tons. Upon the first discovery of a white dwarf, a debate arose as to how far a star can collapse. And in the 1920s two leading astrophysicists, Subrahmanyan Chandrasekgar and Sir Arthur Eddington came up with different conclusions. Chandrasekhar looked at the relations of mass to radius of the star, and concluded an upper limit beyond which collapse would result in something called a neutron star. This limit of 1.4 solar masses was an accurate measurement and in 1983, the Nobel committee recognized his work and awarded him their prize in Physics. The white dwarf is massive, but not as massive as the next order of imploded star known as a neutron star. Often as the nuclear fuel is burned out, the star will begin to shed its matter in an explosion called a supernovae. When this occurs the star loses an enormous amount of mass, but that which is left behind, if greater than 1.4 solar masses, is a densely packed ball of neutrons. This star is so

6 really smart answers to the toughest interview questions

6 really smart answers to the toughest interview questions You’re in a job interview, and have been rocking all the usual questions that come your way. What’s your five-year plan? Tell me about your last job. What brought you to this industry in the first place? Then there’s a question that stumps you a little, and you pause. Uh oh, they’ve hit a gap in your prep, or touched on an uncomfortable subject. How do you deal with questions that you didn’t anticipate? Let’s look at some of the toughest interview questions, and some sample responses.I know everyone has a go-to â€Å"weakness† in these job interviews, but what’s your real biggest weakness?I tend to take on too much myself, because I have high standards and get impatient when others don’t meet them. But I’m working on my delegating skills and learning how to let others do their jobs while I do mine.Why do you have so many jobs on your resume? Do you consider yourself a â€Å"job hopper†?No, I don’t thi nk of it that way. I have been very faithful to my vision when it comes to my career. I have very specific goals, long-term, and have taken advantage of growth opportunities along the way when certain jobs started to feel stagnant. For example, I left XYZ Corp because there was no room for professional development, no chance to be promoted. That’s why I was so excited to hear about your opening here. This is the kind of place I can see myself growing and evolving for a long time.Looking at your resume, you’re awfully senior for this junior-level job. How do we know you won’t jump ship as soon as something else comes along?I’m a big believer that you can’t always take a linear approach to your career, that it’s about the quality of experience rather than the quantity. This job appeals to me because it’s a chance to learn and grow in an area that interests me for the future, so to me that step back in seniority is an investment.It looks like you have a significant gap on your resume, and your cover letter mentioned that you took time off to start a family. Will you be having more kids in the near future?Taking time off was a choice that worked best at the time, but now I’m ready to move forward with the next phase, and focus fully on the next steps in my career. [Note: it’s illegal for interviewers to ask about your family status, so if you get a sneaky question like this one, it’s best to turn it into a general answer without giving specific information about your spouse, your family, your personal plans, etc.]Do you think you’ve peaked in your career?Oh jeez, I hope not! But seriously, I don’t think of a career as an uphill/downhill thing. I try to keep learning new things and finding new and better ways to do my job. So it’s less about being on the way up or on the way down, and more about keeping things moving forward, no matter what.How would you deal with a colleague who threw you under the bus for something that was their fault?Office politics are always fun, right? Seriously, though, I’d start by taking it up with the person directly. I don’t think there’s anything to gain from publicly humiliating anyone, even if they just tried to do it to me. I’d also make sure that my boss privately understands the reality of what went on- what my role was in the issue, whether I shared any of the blame, or what I did to help resolve the problem.If you’re facing challenging questions, don’t stress out too much, and don’t let yourself get that â€Å"deer in headlights† look. The most important thing is to pivot the question into familiar territory- especially if you can use it to highlight one of your strengths, or emphasize your goals.