The Elements Magnet Set: With Complete Periodic Table!

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The Elements Magnet Set: With Complete Periodic Table!

The Elements Magnet Set: With Complete Periodic Table!

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Price: £4.995
£4.995 FREE Shipping

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Li, Shu-hua (1954). "Origine de la Boussole II. Aimant et Boussole". Isis (in French). 45 (2): 175–196. doi: 10.1086/348315. JSTOR 227361. S2CID 143585290. un passage dans le Liu-che-tch'ouen-ts'ieou [...]: "La pierre d'aimant fait venir le fer ou elle l'attire." The same situations that create magnetic fields—charge moving in a current or in an atom, and intrinsic magnetic dipoles—are also the situations in which a magnetic field has an effect, creating a force. Following is the formula for moving charge; for the forces on an intrinsic dipole, see magnetic dipole. In ancient China, the earliest literary reference to magnetism lies in a 4th-century BC book named after its author, Guiguzi. [8] The two sources of magnetism are electric current and spin magnetic moments of elementary particles (primarily electrons). Griffiths, David J. (1998). Introduction to Electrodynamics (3rd ed.). Prentice Hall. ISBN 978-0-13-805326-0. OCLC 40251748.

An electromagnet is made from a coil of wire that acts as a magnet when an electric current passes through it but stops being a magnet when the current stops. Often, the coil is wrapped around a core of "soft" ferromagnetic material such as mild steel, which greatly enhances the magnetic field produced by the coil. Magnets that get too near each other can strike each other with enough force to chip and shatter the brittle magnets, and the flying chips can cause various injuries, especially eye injuries. There have even been cases where young children who have swallowed several magnets have had sections of the digestive tract pinched between two magnets, causing injury or death. [42] Also this could be a serious health risk if working with machines that have magnets in or attached to them. [43] Jiles, David (2 September 2015). Introduction to magnetism and magnetic materials (Thirded.). Boca Raton. ISBN 978-1-4822-3887-7. OCLC 909323904. {{ cite book}}: CS1 maint: location missing publisher ( link)

a b c Chu, Steven. Critical Materials Strategy United States Department of Energy, December 2011. Accessed: 23 December 2011. Drak, M.; Dobrzanski, L.A. (2007). "Corrosion of Nd-Fe-B permanent magnets" (PDF). Journal of Achievements in Materials and Manufacturing Engineering. 20 (1–2). Archived from the original (PDF) on 2012-04-02. The Permanent Magnet Market – 2015" (PDF). Magnetics 2013 Conference. February 7, 2013 . Retrieved November 28, 2013.

Although for many purposes it is convenient to think of a magnet as having distinct north and south magnetic poles, the concept of poles should not be taken literally: it is merely a way of referring to the two different ends of a magnet. The magnet does not have distinct north or south particles on opposing sides. If a bar magnet is broken into two pieces, in an attempt to separate the north and south poles, the result will be two bar magnets, each of which has both a north and south pole. However, a version of the magnetic-pole approach is used by professional magneticians to design permanent magnets. [ citation needed] Because this is a cross product, the force is perpendicular to both the motion of the particle and the magnetic field. It follows that the magnetic force does no work on the particle; it may change the direction of the particle's movement, but it cannot cause it to speed up or slow down. The magnitude of the force is Norton, Quinn. "A Sixth Sense for a Wired World." Wired. June 7, 2006. (Sept. 5, 2022) http://www.wired.com/news/technology/0,71087-0.html

What is a magnet?

Sintered Nd 2Fe 14B tends to be vulnerable to corrosion, especially along grain boundaries of a sintered magnet. This type of corrosion can cause serious deterioration, including crumbling of a magnet into a powder of small magnetic particles, or spalling of a surface layer. Neodymium magnets, a type of permanent rare earth magnet, are the stongest magnets in the world. Crafted from neodymium, iron, and boron (NdFeB), these magnets provide decades of reliable performance in projects large and small. Despite their significant strength, neodymium magnets are cost-effective when compared to other types of magnets, and are the preferred choice for many consumer, commercial, industrial, and scientific applications. Schmidl, Petra G. (1996–1997). "Two Early Arabic Sources On The Magnetic Compass". Journal of Arabic and Islamic Studies. 1: 81–132. In a hard magnet such as a ferromagnet, M is not proportional to the field and is generally nonzero even when H is zero (see Remanence).

Penicott, Katie. "Magnetic Polymer Makes Its Debut." Physics Web Nov. 16, 2001. (Sept. 5, 2022) http://physicsweb.org/articles/news/5/11/11 Electromagnetism has continued to develop into the 21st century, being incorporated into the more fundamental theories of gauge theory, quantum electrodynamics, electroweak theory, and finally the standard model. When a charged particle moves through a magnetic field B, it feels a Lorentz force F given by the cross product: [20] F = q ( v × B ) {\displaystyle \mathbf {F} =q(\mathbf {v} \times \mathbf {B} )} M. Sagawa; S. Fujimura; N. Togawa; H. Yamamoto; Y. Matsuura (1984). "New material for permanent magnets on a base of Nd and Fe (invited)". Journal of Applied Physics. 55 (6): 2083. Bibcode: 1984JAP....55.2083S. doi: 10.1063/1.333572. Gauder, D. R.; Froning, M. H.; White, R. J.; Ray, A. E. (15 April 1988). "Elevated temperature study of Nd‐Fe‐B–based magnets with cobalt and dysprosium additions". Journal of Applied Physics. 63 (8): 3522–3524. Bibcode: 1988JAP....63.3522G. doi: 10.1063/1.340729.

Magnets in Everyday Use

CPSC Safety Alert: Ingested Magnets Can Cause Serious Intestinal Injuries" (PDF). U.S. Consumer Product Safety Commission. Archived from the original (PDF) on 8 January 2013 . Retrieved 13 December 2012.



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