Just like a bar magnet, the magnetic field of Earth is a dipole field with two poles, located at either end. The magnetic field is strongest at each of these poles. Magnetic field around a spherical dipole magnet like the Earth with a schematic dipole magnet drawn to its center. (Wikime...
Martin Voss // WIkimedia Commons #41. Australian shepherd (tie) - Average life span: 13 years - Popularity rank: 12 The Australian shepherd is a lean and tough ranch dog closely associated with the cowboy life. This breed exhibits an irresistible impulse to herd everything: birds, dogs, ...
Peter // WIkimedia Commons #41. Field spaniel (tie) - Average life span: 13 years - Popularity rank: 157 The field spaniel is known for being docile, but vigorous when at play or in the field. Field spaniels are sweet and sensitive, but also independent. They are trustworthy with kids...
The field spaniel is known for being docile, but vigorous when at play or in the field. Field spaniels are sweet and sensitive, but also independent. They are trustworthy with kids, tolerant of other animals, and responsive to training. #41. English springer spaniel (tie) Pedro Lopez // ...
Iron loses its magnetism when it’s heated to a few hundred degrees, yet Earth’s core – which produces a strong enough magnetic field to hold the planet together – is made of iron that’s so hot it is in a liquid state! Why then, does the molten iron in Earth’s core produce ...
and Empower the Mind, The Best American Science Writing 2012, The Future of Humanity : Terraforming Mars, Interstellar Travel, Immortality, and Our Destiny Beyond , Quarks, Symmetries and Strings, Strings, Conformal Fields, and M-Theory, Weapons in Space, Quantum Field Theory: A Modern Introducti...
PD/Wikimedia Commons This illustration shows time periods when the magnetic poles were the same as today (in black) or the opposite of today (in white). The long view shows us how often the poles have switched, a phenomenon called geomagnetic reversal, and how not-a-big-deal it is overa...
The USS Chicago submarine. U.S. Navy Photo by Photographer’s Mate 1stClass Kevin H. Tierney and in the public domain viaWikimedia Commons. In order to prevent detection, engineers usedegaussing techniques; i.e., methods to suppress the ship’s signature to safe levels. One such technique ...
Figure 23.4.7:The rows of rare earth magnets (protruding horizontally) are used for magnetic braking in roller coasters. (credit: Stefan Scheer, Wikimedia Commons) Induction cooktops have electromagnets under their surface. The magnetic field is varied rapidly producing eddy currents in the base of...
Credit: Wikimedia Commons Researchers at Aalto University and the University of Helsinki have succeeded for the first time ever in affecting metacognition of a tactile working memory task by combining neural pathway imaging and magnetic stimulation of the brain. Understanding brain function might help ...