What are magnets ? A magnet is an object ( typically a material with metallic properties ( ferrous ) that emits a magnetic field and attracts other iron objects or aligns itself with another’s external magnetic field, produced by the alignment of its internal component atoms. This is one of the worlds biggest phenomenons, we know how they work, but it is confusing to understand the invisible power of them. Did you know that the earth is a giant magnet! How were they discovered ? In the early days the Greeks and ancient egyptians discovered the naturally occurring lodestone that could attract iron particles and iron ores, the Greeks believed that this was a gift of the gods. The word “Magnet” is derived from a Greek word of a place, called “Magnesia”, where magnetite was widely distributed. In old English, it was called “lodestone”, meaning “waystone”. Well how do they work ? Magnets refer to the internal alignment of the metals component atoms, most metallic objects can be turned into a magnet by a strong jolt or set of jolts of a very strong magnet to be suddenly attached and detached from the piece of steel you want to be permanently magnetized, what this does is more suddenly and strongly moves the internal component atoms into order, where they will stay. There are other methods in which ore can be magnetized such as with the earth and how it spins in its orbit and magnetizes the naturally occurring lodestone which is more complicated. In order for a metal object to be transformed into a magnet its internal component atoms must be aligned properly - all heading in the same direction like in the picture below, otherwise it will be weak or will not work at all! Electromagnets what are they? An ... ... middle of paper ... ...tractant to the voice coil. The player gives a certain orientation of polarity and intensity to send to the voice coil, when these polarities are changed the magnet simply attracts the whole voice coil and diaphragm with it to make different pulses of sound, this happens very fast to make music! Future uses for magnets: One of the more potential future uses for magnets, among many is the magnetically levitating wind turbines. Standard wind turbines have to sit on bearings and be attached to highly efficient electricity generators, the standard efficiency of these turbines is 1% Well magnets and magnetic levitation has made it possible to gain over 20% more efficiency per amount of wind pressure and volume, only because of its highly effective system of frictionless magnets supporting these colossal fans, just like maglev trains just without the forward movement.
In the twentieth century the medical field has seen many changes. One way that hospitals and nursing specifically has changed and implemented the changes is by pursuing accreditations, awards, and recognitions. The purpose of this paper is to understand Magnet Status and the change required by hospitals to achieve it.
One reason Kealing Magnet Program would be a good fit for me is because I am a hard-working student who wants to get ahead and learn a lot. Another reason is because I want a challenging school, and Kealing Magnet is challenging, but also very helpful. I define a challenging school as a school with a lot of work. I want to apply to the McCallum Fine Arts Program for high school, and going to Kealing would give me knowledge and support in that. Being at Kealing would be a fun and accommodating opportunity, while also educating me. I want to both enjoy school and learn things, and Kealing would satisfy that for me. I have looked at the website and am looking forward to the piano in the choir in particular. I have been having piano lessons for about two years now, and that sounds like a fun activity for me.
Armature - Sometimes called a rotor. This is the part that spins. The armature can be either a permanent magnet or an electromagnet.
During the late 1970's, the world of diagnostic imaging changed drastically due to the introduction of Magnetic Resonance Imaging, also known as MRI. For over 30 years, they have grown to become one of the most significant imaging modalities found in the hospitals and clinics ("EDUCATIONAL OBJECTIVES AND FACULTY INFORMATION"). During its ancient days, these machines were referred to as NMRI machines or, “Nuclear Magnetic Resonance Imaging.” The term “nuclear” comes from the fact that the machine has the capability of imaging an atom's nucleus. Eventually, the term was dropped and replaced with just MRI, because “nuclear” did not sit well with the public view ("EDUCATIONAL OBJECTIVES AND FACULTY INFORMATION"). Many people interpreted the machine to produce an excess amount of radiation in comparison to the traditional X-ray machine. What many of them were unaware of, MRI does not disperse a single ounce of ionizing radiation making it one of the safest diagnostic imaging machine available to this date. MRI machines actually use strong magnetic fields and radio waves to produce high quality images consisting of precise details that cannot be seen on CT (Computed Tomography) or X-ray. The MRI magnet is capable of fabricating large and stable magnetic fields making it the most important and biggest component of MRI. The magnet in an MRI machine is measured on a unit called Tesla. While regular magnets commonly use a unit called gauss (1 Tesla = 10,000 gauss). Compared to Earth's magnetic field (0.5 gauss), the magnet in MRI is about 0.5 to 3.0 tesla range meaning it is immensely strong. The powerful magnetic fields of the machine has the ability to pull on any iron-containing objects and may cause them to abruptly move with great for...
How can a man entangled in the dangerous crimes of smuggling, so engrossed with his past love that he lost her, and shed his own blood due to a misunderstanding ever be forgiven? In other words, should he be condoned for his acts, or should he forever be in Hell and forgotten? One might acknowledge the fact that this man's past, behavior, and intentions are unknown, therefore standing in either a positive or neutral view. Another might add that sins can never be forgiven, no matter what reasons had caused them, leaning toward a negative standpoint. Jay Gatsby, a character in F. Scott Fitzgerald’s novel The Great Gatsby, is much like the preceding man described, having faced the shame and committing the same dishonorable acts, and is often criticized by those in a negative standpoint. However, within the text, Nick Carraway, the narrator of the novel, plainly states, “Gatsby turned out all right at the end” (6). Nick knew all about the immoral deeds Gatsby had carried out, so how could Nick make this claim in honor of a dead man? The answer is quite simple: Nick realized Gatsby’s incorruptible dream was the most admirable feat out of all the characters in the book, something that not only made Gatsby respectable to Nick, but great.
The first compasses in Han dynasty China were made of lodestone, a naturally magnetized ore of iron. The compass was later used for navigation by the Song Dynasty. Later compasses were made of iron needles, magnetized by striking them with a lodestone. Dry compasses begin appearing around 1300 in Medieval Europe. This was supplanted in the early 20th century by the liquid-filled magnetic compass.A number of ancient cultures used lodestones, suspended so they could turn, as magnetic compasses for navigation. Early mechanical compasses are referenced in written records of the Chinese, who began using it for navigation sometime between the 9th and 11th century, "some time before 1050, possibly as early as 850." A common theory by historians, suggests
One of the important factors in this field is the MRI machine. MRI stands for Magnetic Resonance Imaging. The MRI machine is a large, strong magnet. The magnetic fields line up
The relationship between electricity and magnetism is that each phenomenon generates a field. Electric fields can be pictured by thinking in terms of gravitational forces. Where, any two objects have a gravitational force on one another. Any two electric charges have a force between them (either repelling, or attracting depending on polarity). These electric fields are vector forces, with size and direction at each point in space....
It began to teach us more about electricity which led to many advanced electronics today. The Coil isn’t used for power anymore but more as a sort of example of electricity. When it is tweaked it can cause a variety of things to happen such as, cause electron winds, shoot bolts of lightning, and send electric currents through a human body. The Tesla Coil was used for early radio antennas and telegraphy. It is also still being used in some cases and some people right now are fundraising to make two tesla coils that are 10 stories tall and about the size of a football field.
Usually magnetic fields are created when an electric current is applied to a set of conductive wires wound together (Dixon, 2001). Magnetic fields can also be created using Permanent Magnets (PM). Electrical motors can also work as electrical generators (Correla, 1986). Electrical generators are devices capable of converting mechanical energy into electrical energy. An example would be a wind turbine which works as an electrical generator.
The Earth is a home for mankind, a planet sustaining life, and it is also a giant magnet! Magnets in general, no matter what type of magnet it is, have two end faces called poles. Poles are where the magnetic force is most effective. These two poles are known as the north pole and the south pole. Magnets also create a magnetic field from the particles within the magnet. The Earth resembles this same structure. The earth has a geographic north pole and a geographic south pole. Since opposites attract in magnets the south pole of the core of the earth points towards the geographic north pole of the earth and the north pole points towards the geographic south pole of the earth. The core of the earth serves the same purpose as the particles in m...
Magnets are stones that produce magnetic fields. The magnetic field is invisible, but is responsible for the most noticeable aspect of a magnet: the attraction of a metal object or the repulsion of another magnet. Magnets are used in common everyday household items: credit cards, TVs, speakers, motors, and compasses. A magnets strength is measured by its magnetic moment. (“Magnetism”)
Before understanding the physics principles, one must understand the physical design that induces them. A magnetic disk is a flat, circular, rigid sheet of aluminum coated with a layer of magnetic material (can be double sided). The material usually is a form of iron oxide with various other elements added. The disk rotates upon a central axis and a movable read/write head writes information along concentric tracks (circular paths traced out by motion of the disk) on it. Multiple disks can be stacked to store more information. Typically (1985) 11 disks with 22 surfaces, of which 20 are used (minus top/bottom), are manipulated to read/write data.
Temperature has a large effect on particles. Heat makes particles energized causing them to spread out and bounce around. Inversely the cold causes particles to clump together and become denser. These changes greatly F magnetic the state of substances and can also influence the strength of magnetic fields. This is because it can alter the flow of electrons through the magnet.
A magnet is a solid object, usually made of metal iron, which has the ability to attract other materials (e.g., iron, steel, cobalt and nickel) within a magnetic field.