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The radio spectrum is the part of the electromagnetic spectrum with frequencies from 3 Hz to 3,000 GHz (3 THz ). Electromagnetic waves in this frequency range, called radio waves, are widely used in modern technology, particularly in telecommunication. To prevent interference between different users, the generation and transmission of radio ...
Scotland (Scots: Scotland; Scottish Gaelic: Alba) is a country that is part of the United Kingdom.It contains nearly one-third of the United Kingdom's land area, consisting of the northern part of the island of Great Britain and more than 790 adjacent islands, principally in the archipelagos of the Hebrides and the Northern Isles.
The Boeing 747 is a long-range wide-body airliner designed and manufactured by Boeing Commercial Airplanes in the United States between 1968 and 2023. After the introduction of the 707 in October 1958, Pan Am wanted a jet times its size, to reduce its seat cost by 30%. In 1965, Joe Sutter left the 737 development program to design the 747.
Manual (music) The console of the Great Organ at the Church of St Sulpice built by Aristide Cavaillé-Coll in 1862. An electronic organ with three manuals. The two lower manuals are each five octaves in range, while the uppermost manual spans two octaves. The word " manual " is used instead of the word "keyboard" when referring to any hand ...
Apple headphones. Apple Inc. has produced and sold headphones since 2001, available for standalone purchase and bundled with iPhone (until 2020) and iPod (until 2022) products. Apple's current product line consists of EarPods (wired earbuds available with a 3.5mm headphone or Lightning connector or USB-C ), AirPods and AirPods Pro (wireless ...
The Day of the Dead ( Spanish: el Día de Muertos or el Día de los Muertos) [2] [3] is a holiday traditionally celebrated on November 1 and 2, though other days, such as October 31 or November 6, may be included depending on the locality. [4] [5] [6] It is widely observed in Mexico, where it largely developed, and is also observed in other ...
Socrates (/ ˈ s ɒ k r ə t iː z /; Greek: Σωκράτης; c. 470 –399 BC) was a Greek philosopher from Athens who is credited as the founder of Western philosophy and among the first moral philosophers of the ethical tradition of thought.
t. e. A transgender person (often shortened to trans person) is someone whose gender identity differs from that typically associated with the sex they were assigned at birth. [1] Some transgender people who desire medical assistance to transition from one sex to another identify as transsexual.