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The global electromagnetic resonance phenomenon is named after physicist Winfried Otto Schumann who predicted it mathematically in 1952. Schumann resonances are the principal background in the part of the electromagnetic spectrum [2] from 3 Hz through 60 Hz [3] and appear as distinct peaks at extremely low frequencies around 7.83 Hz (fundamental), 14.3, 20.8, 27.3, and 33.8 Hz.
The fundamental Schumann resonance is at approximately 7.83 Hz, the frequency at which the wavelength equals the circumference of the Earth, and higher harmonics occur at 14.1, 20.3, 26.4, and 32.4 Hz, etc. Lightning strikes excite these resonances, causing the Earth–ionosphere cavity to "ring" like a bell, resulting in a peak in the noise ...
Current events; Random article; ... (Ogg Theora video file, length 24 s, ... Animation of Schumann resonance in Earth's atmosphere. Date: 11 January 2012:
Winfried Otto Schumann (May 20, 1888 – September 22, 1974) was a German physicist and electrical engineer who predicted the Schumann resonances, a series of low-frequency resonances caused by lightning discharges in the atmosphere.
Nuclear magnetic resonance (NMR) in the geomagnetic field is conventionally referred to as Earth's field NMR (EFNMR).EFNMR is a special case of low field NMR.. When a sample is placed in a constant magnetic field and stimulated (perturbed) by a time-varying (e.g., pulsed or alternating) magnetic field, NMR active nuclei resonate at characteristic frequencies.
He describes how the comb is mass manufactured, details the spring, gears and governor that drive the box, and shares some history of early music boxes. Outtakes are included at the end of the video. Čeština: Jak funguje music box - krátký naučný film z roku 2015 natočený Billem Hammackem vysvětlující princip funkce hrací skříňky ...
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"Clubbed to Death" is an instrumental composition by Australian music producer Rob Dougan, originally released on Mo' Wax records in 1995. It featured in the 1997 film Clubbed to Death and was given renewed attention in 1999 due to its inclusion in the film The Matrix. It was re-released with new remixes in 2002.