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2024年9月5日 · In electrical engineering, a capacitor is a device that stores electrical energy by accumulating electric charges on two closely spaced surfaces that are insulated from each other. The capacitor was originally known as the condenser, [1] a term still encountered in a few compound names, such as the condenser microphone.
3 天前 · Copper is a chemical element; it has symbol Cu (from Latin cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color.
3 天前 · The following is a list of the best-selling Japanese manga series to date in terms of the number of collected tankōbon volumes sold. All series in this list have at least 20 million copies in circulation.
3 天前 · The Lockheed U-2, nicknamed " Dragon Lady ", is an American single-engine, high altitude reconnaissance aircraft operated from the 1950s by the United States Air Force (USAF) and the Central Intelligence Agency (CIA). It provides day and night, high-altitude (70,000 feet, 21,300 meters), all-weather intelligence gathering. [1]
2 天前 · George Washington (February 22, 1732 – December 14, 1799) was an American Founding Father, politician, military officer, and farmer who served as the first president of the United States from 1789 to 1797. Appointed by the Second Continental Congress as commander of the Continental Army in 1775, Washington led Patriot forces to victory in the American Revolutionary War and then served as ...
2 天前 · San Marino is a landlocked country; however, its northeastern end is within ten kilometres (six miles) of the Italian city of Rimini on the Adriatic coast. The country's capital city, the City of San Marino, is located atop Monte Titano, while its largest settlement is Dogana, within the municipality of Serravalle.
2024年9月12日 · Nitrogen is a chemical element; it has symbol N and atomic number 7. Nitrogen is a nonmetal and the lightest member of group 15 of the periodic table, often called the pnictogens. It is a common element in the universe, estimated at seventh in total abundance in the Milky Way and the Solar System.
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