Yahoo奇摩 網頁搜尋

搜尋結果

  1. en.wikipedia.org › wiki › MagnetMagnet - Wikipedia

    v. t. e. A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, steel, nickel, cobalt, etc. and attracts or repels other magnets. A permanent magnet is an object made from a ...

  2. Silicone rubber is an elastomer (rubber-like material) composed of silicone —itself a polymer —containing silicon together with carbon, hydrogen, and oxygen. Silicone rubbers are widely used in industry, and there are multiple formulations. Silicone rubbers are often one- or two-part polymers, and may contain fillers to improve properties ...

  3. v. t. e. Magnetic therapy is a pseudoscientific alternative medicine practice involving the weak static magnetic field produced by a permanent magnet which is placed on the body. It is similar to the alternative medicine practice of electromagnetic therapy, which uses a magnetic field generated by an electrically powered device. [1]

  4. 129,000–226,000. On 6 and 9 August 1945, the United States detonated two atomic bombs over the Japanese cities of Hiroshima and Nagasaki. The bombings killed between 129,000 and 226,000 people, most of whom were civilians, and remain the only use of nuclear weapons in an armed conflict. Japan surrendered to the Allies on 15 August, six days ...

  5. Magnetic resonance imaging ( MRI) is a medical imaging technique used in radiology to form pictures of the anatomy and the physiological processes inside the body. MRI scanners use strong magnetic fields, magnetic field gradients, and radio waves to generate images of the organs in the body. MRI does not involve X-rays or the use of ionizing ...

  6. en.wikipedia.org › wiki › MexicoMexico - Wikipedia

    Mexico,[a][b] officially the United Mexican States,[c] is a country in the southern portion of North America. Covering 1,972,550 km2 (761,610 sq mi),[11] it is the world's 13th largest country by area; with a population of almost 130 million, it is the 10th most populous country and has the most Spanish speakers in the world.[12] Mexico is ...

  7. en.wikipedia.org › wiki › Buddy_HollyBuddy Holly - Wikipedia

    Buddy Holly. Charles Hardin Holley (September 7, 1936 – February 3, 1959), known as Buddy Holly, was an American singer and songwriter who was a central and pioneering figure of mid-1950s rock and roll. He was born to a musical family in Lubbock, Texas, during the Great Depression, and learned to play guitar and sing alongside his siblings.