Download Electricity and magnetism by Kyle Kirkland PDF

By Kyle Kirkland

Electric gear is essential not just to the commuters touring to and from the workplace but additionally to the fighter pilots who bounce throughout the sky in quick and maneuverable airplanes. different electric units have lengthy been used to shop and play track, upgrading in caliber from early tin or wax cylinders to fashionable compact discs. pcs are omnipresent, remodeling how humans speak and behavior enterprise, and the longer term holds much more promise of swap. Readers should be interested in "Electricity and Magnetism", which examines electrical energy, magnetism, and the connection among the 2 that makes electromagnetism such a major and pervasive portion of our international. The chapters of this quantity introduce the elemental ideas of this department of physics and discover their common functions, from powering smooth civilization's expertise to being the driver at the back of a lot of the human physique. This booklet is a brilliant source for college students attracted to this desirable element of technology.

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The strong magnetic field aligns hydrogen atoms as if they were little compass needles, and the radio waves interfere with this alignment. The MRI machine uses computers to analyze the signals given off by the atoms as they change alignment. Since hydrogen atoms are involved, MRI works best in areas with a lot of water or fat content, such as the brain. Millions of MRI procedures are performed annually. Images produced by MRI permit doctors to spot diseased tissue and MRI images of the brain, such as this one, help physicians find abnormal tissue.

Leon Kaufman) 26 Electricity and Magnetism organs much more easily than they ever could before. These images are particularly useful in finding tumors growing in the nervous system, either in the spinal cord or the brain, and many lives have been saved by their use. Paul C. Lauterbur and Sir Peter Mansfield, scientists who made major contributions to the development of this device, won the Nobel Prize in physiology or medicine in 2003. But this technology has even more applications. One of the most exciting applications is called fMRI, which stands for functional magnetic resonance imaging.

But in a battery that uses reversible reactions, the original chemicals can be re-formed and the battery’s electrical “life” restored. Doing so requires running the reaction in reverse. This means that since the original reaction produced electricity, the reverse reaction will consume it. In a rechargeable battery, recharging sends an electric current through the battery’s terminal in a direction opposite its normal flow. But only in a rechargeable battery will this work; trying to do this with a nonrechargeable battery not only is a waste of time but can be risky as well, depending on the battery type.

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