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Astrophysics
Astrophysics is the scientific discipline concerned with the events that are taking place on the grandest of stages; the universe. Questions about the formation and evolution of the planets, solar systems, stars, and galaxies found within the universe, as well as questions regarding black holes, cosmic rays, particle and nuclear astrophysics, nucleosynthesis, and magnetohydrodynamics should be directed here.
1,304 Questions
How many holes are in a crumpet?
A crumpet typically has multiple holes on its surface, with a range of about 30-50 holes depending on the size and thickness of the crumpet. These holes are intentionally created during the cooking process to give the crumpet its characteristic porous texture, ideal for absorbing butter and other toppings.
Anti matter is matter identical to natural matter as we know it in every way except that its charges are opposite. An entire galaxy could be made out of anti matter and it could function the same exact way our galaxy functions. Anti matter is considered unstable because it will instantly destroy itself upon contact with natural matter. This reaction is considered 100% energy efficient (nuclear fission is 1.5% efficient).
Uranium is formed through the process of supernovae, where heavy elements are created by nuclear reactions in the hot, dense cores of dying stars. These heavy elements are then scattered into space when the star explodes, eventually forming into uranium-rich mineral deposits on Earth through geological processes.
Black Kettle, a Southern Cheyenne chief, was killed in the Sand Creek massacre on November 27, 1864. U.S. army troops attacked his camp, resulting in the deaths of many Cheyenne and Arapaho people, including Black Kettle.
What is the speed limit on Interstate 90 In eastern Idaho?
This is copied from the Idaho Statute #49-464 regarding Idaho speed limits. (c) Seventy-five (75) miles per hour on interstate highways;
(d) Sixty-five (65) miles per hour on state highways;
(e) Fifty-five (55) miles per hour in other locations unless otherwise
posted up to a maximum of sixty-five (65) miles per hour.
(3) The maximum lawful speed limit on interstate highways shall not
exceed sixty-five (65) miles per hour for vehicles with five (5) or more axles
operating at a gross weight of more than twenty-six thousand (26,000) pounds.
What is a super-massive black hole?
A supermassive black hole is a black hole with a very large mass, millions to billions times the mass of the sun. The supermassive black hole in our galaxy is about 4 million times the mass of the sun.
What is the name giving to material orbiting the event horizon of a black hole?
The material orbiting the event horizon of a black hole is called an accretion disk. This disk is formed from gas and dust swirling around the black hole due to its immense gravitational pull, heating up and emitting intense radiation before being pulled beyond the event horizon.
A true tape is a term used in the finance industry to refer to an accurate and unaltered record of trading transactions, typically involving the buying and selling of securities. It is considered essential for transparency and compliance purposes.
Black holes were described theoretically before evidence for their existence was collected from astronomical observations. The philosopher and geologist John Michell in the late 18th century described what would happen to infalling matter approaching a body of a certain mass where it had sufficient acceleration from gravity to approach the speed of light, and proposing the idea that light theoretically emitted by it would be unable to escape; but it wasn't until Einstein's General theory of Relativity (1915) that the framework of gravitation was in place and the reality of black holes could be described mathematically. Building upon Einstein's work, the effect of gravity on light was much better understood and solutions to his field equations yielded much more accurate models of black holes' properties and strong theoretical evidence for their existence. Observational evidence came later, and because black holes cannot emit light, the evidence was indirect, in the form of certain x-ray sources, relativistic jets, quasars or galactic nuclei, and orbital motion of massive bodies. Credit for discovery of the first strong black hole candidate in an x-ray binary system (Cygnus X-1) goes to Bolton, Murdin, and Webster in 1972.
Who is or was the tallest girl on earth?
What are Liberal Arts, Humanities, and General Studies?
Liberal Arts, Humanities, and General Studies are all interdisciplinary college programs that allow students to study across multiple departments.A student earning a degree in Liberal Arts, Humanities, or General Studies is likely to take classes in history, English, anthropology, and philosophy in the course of one degree program.
These departments operate on the philosophy that many perspectives may be taken to approach a topic.Also, students of these programs generally believe in the value of a broad education as opposed to specialized training in one field.
How do Liberal Arts, Humanities, and General Studies differ?
In many cases differences between Liberal Arts, Humanities, and General Studies programs are semantic.However, General Studies Colleges are generally for students who have delayed or interrupted their college education.Students of a General Studies College are often considered non-traditional and may attend night or weekend classes.The Liberal Arts originate from seven liberal arts studied by the ancient Greeks and medieval universities, but have become so broad as to be nearly indistinguishable from a Humanities program. Unlike students of Liberal Arts who have a choice of earning a general Liberal Arts degree or majoring in one of the disciplines under the Liberal Arts umbrella, Humanities students take classes in a Humanities department, but earn a degree in English, foreign language, philosophy, etc.
Earning a degree in Liberal Arts, Humanities, or General Studies
Liberal Arts, Humanities, and General Studies degree programs often require heavy research and reading.Since all three programs cover a variety of fields, students should expect to read literature, theory, historical documents, and research data.
The curriculum involved in Liberal Arts, Humanities, or General Studies programs is often flexible.Students are given input into structure of their education and, aside from core classes, are allowed to choose courses that fit with their individual academic goals.
A senior project or independent study that brings together several disciplines in one cohesive perspective is often a requirement of these programs.Also, students should be prepared for taking courses in science and mathematics to augment their coursework.
Liberal Arts, Humanities, and General Studies Careers
Graduates of Liberal Arts, Humanities, and General Studies programs find jobs in a variety of fields.Popular careers for graduates are often found in education, publishing, journalism, tourism, and politics.
What is speed limit attempted manslaughter?
There is no specific offense called "speed limit attempted manslaughter." However, if a person intentionally drives above the speed limit with the goal of causing harm to others, it could be considered attempted manslaughter if the reckless driving results in a foreseeable risk of death or serious injury to another person.
How can you get black and white 2 to work?
To get Black and White 2 to work, ensure that your computer meets the minimum system requirements, update your graphics and sound card drivers, and try running the game in compatibility mode. If the issue persists, consider reinstalling the game or seeking support from the game's developer or publisher.
Who put forward a theory about black holes?
John Michell assumed that an object that was compact enough would not be able to emit light; his calculations were based on the escape velocity. At his time (18th. century) the idea was considered preposterous.
Soon after the publication of the General Theory of Relativity, Schwarzschild (by coincidence, the name means "black shield") did calculations that predicted the possibility of the black hole. Note that the explanation of why the black hole would not emit any light is somewhat different than the ones by Michell. Michell's calculations were based on the escape velocity of an object; the modern version of the black hole is about space-time being so distorted that an object can only get deeper into a black hole, no matter what its velocity.
According to calculations by Stephen Hawkings, a black hole would gradually evaporate, despite the fact that matter can't directly get out from the inside of the black hole. His calculations are based on quantum-mechanical effects near the border (event horizon) of the black hole.
A powerful torch lit inside a tornado might be visible to someone observing it from a safe distance, but dust and debris would likely absorb most if not all of its light. However a torch dropped into a black hole would completely disappear from view, not only because it would be completely and utterly destroyed, but also because the light leaving it would not be allowed to escape by the immense gravitational force of the black hole.
Not necessarily. In the case of supercooled helium-4, the probability amplitude is positive for the atoms to get on top of each other since they are Bose particles. Bose-Einstien condensation is the name for this process of Bose particles going into the same state, and then when enough particles get on top of each other you get a bosenova, which is like a nanoscopic supernova. Since a bosenova doesn't actually result in a black hole, then it can be said that a singularity has been observed.... I think!
Keeping in mind that a true singularity is ONLY a mathematical construct.
As is division by 0.
Conceptually it might make sense to some.
Rigorously it is an undefined entity within the aspects of mathematical physics and QM.
Infinite mass can only be approached but never attained within the postulates of even the most progressive interpretations of theoretical physics.
The observation of a singularity is in itself a contradiction.
Short answer: No
short answer: Yes
Quantum mechanics (or at least the part of it used here) assumes that local space is flat, which is another way of saying there is a negligible amount of stuff there. If you were to stack sufficient numbers of helium nuclei on top of each other, that assumption would break down. At some point the space will be curved enough (high enough gravity) that the helium nuclei will actually start fusing into carbon or possibly some other effect. At the end of the day you will be collapsing first into a chunk of neutrons then into a black hole with the normal event horizon. There is probably a more elegant way to explain why singularities being surrounded by event horizons is a requirement of the space we live in irrespective of the stuff the singularity is made of.
No, the hole will not be in spec. The hole diameter callout of 375 0002-0000 indicates a diameter range of 0.3750 to 0.3752 inches. Since the Deltronic pin is 0.3752 inches in diameter, it will not go through the hole if it is at the lower end of the specified range.
Do periodic cicadas leave holes in the earth when they emerge?
Yes, the hole remains until it collapses or is filled by gravity and rain.
Which scientist of the 1700's was the first to theorize about the existence of black holes?
In 1873, John Michell, a geologist, wrote a letter to Henry Cavendish, discoverer of hydrogen, suggesting a super-massive body whose gravity was so great that even light could not escape it. The letter was published in the Transactions of the Royal Society in 1784, and is a permanent part of their record.
The intense gravitation of a black hole is strong enough to bend the space and time in it's vicinity. This intense gravitation causes a sort of a funnel effect in that space time which causes objects to be gravitationally attracted to it. It is believed that the atoms of matter entering the black hole are scrunched down to the smallest possible area. The more matter that falls into the black hole the more massive it becomes and the stronger it's gravitaional field. Black holes suck anything near it.
How do super massive black holes form?
It is uncertain how supermassive black holes form. Some scientists suggest they form from the simple collapse of clouds of gas too massive to form stars. They might also originate as large stellar mass black holes that form the the deaths of massive stars and the merge into a single black hole. All supermassive black holes grow by consuming more matter.
If you know how far away it is, and the angle that it subtends, you can tell its size. For example, if something is 100 meters away and it fills 10 milliradians, it's 100 * 0.01 = 1 meter across. (A milliradian is 1/1000 of a radian, and a radian is about 57 degrees.)
The size in your telescope is easy, and it's a simple optical calculation to figure out how large an angle it actually takes up. That is, so long as it's something that appears as an object, not just a point. So the method will work with a galaxy, but not a black hole.
The only part with uncertainty is how far away it is. The red shift of the light can tell you that. Everything in the universe is moving apart, and the farther away something is the faster it is moving, so the greater the red shift. This method has been calibrated in a number of ways, in particular by observing certain types of variable stars. So that part of the method is pretty solid, too.
What are the known affiliations with bandanas their colors and how they are worn?
The bandanna is affiliated with the gangs and their activity. The colors specify between the groups. Most popularly the red and blue. Some say that the bandanas distiguish between the races, and others say for where you live. What's also confusing is where they can be worn. Since in most public places, gang affiliations are prohibited, it's hard to discern whether someone is wearing a scarf or a headdress. Basically, you can wear them anywhere, head, wrists, feet, but they are mostly worn with gang. There are a variety of colors and styles. Those who usually wear them are of ethnic, youth or deviant groups. In San Francisco, they have menus of bandannas, their colors, and which back pocket they hang out of for "friends of Dorothy's"...ie, gay men. For steet gangs. Bloods wear a red bandana hanging from their back right pocket, crips blue hanging from their back left pocket, and south side or sur 13 wear navy blue, black, or grey hanging from their back right pocket.
What is the solution to a hole INSIDE the tooth?
The solution for a hole inside the tooth, also known as a cavity, is typically a dental filling. This involves removing the decayed part of the tooth and filling the space with a material such as composite resin or amalgam to restore the tooth's structure and function. It is important to address cavities promptly to prevent further damage and potential infection.
How can you stop the pain from a hole in your gum that has been there for quite along time?
Food is getting into the hole and causing infection. It's wise to see your dentist. Although it sounds gross (it's actually relieving) the dentist can reopen the gum and pack it with antibiotics and should feel much better. I had this happen when I had my 4 wisdom teeth taken out. It hurt like crazy.
