That+may+be+tuned
41Animal echolocation — Echolocation, also called biosonar, is the biological sonar used by several animals such as dolphins, shrews, most bats, and most whales. The term was coined by Donald Griffin, who was the first to conclusively demonstrate its existence in bats.… …
42Quantum dot solar cell — Spin cast quantum dot solar cell built by the Sargent Group at the University of Toronto. The metal disks on the front surface are the electrical connections to the layers below. Quantum dot solar cells are an emerging field in solar cell… …
43Gong — Tamtam redirects here. For other uses, see Tamtam (disambiguation). This article is about the musical instrument. For other uses, see Gong (disambiguation). See also: slit gong A gong collection in a Gamelan ensemble of instrum …
44Control line — Brodak Control Line Aerobatic Strega in flight Control line (also called U Control ) is a simple and light way of controlling a flying model aircraft. The aircraft is connected to the operator by a pair of lines, attached to a handle, that work… …
45Inharmonicity — In music, inharmonicity is the degree to which the frequencies of overtones (known as partials, partial tones, or harmonics) depart from whole multiples of the fundamental frequency. Acoustically, a note perceived to have a single distinct pitch… …
46Timeline of the John F. Kennedy assassination — John F. Kennedy This article considers the detailed timeline of events before, during, and after the assassination of John F. Kennedy, the 35th President of the United States. Contents 1 Prelude …
47animal communication — Transmission of information from one animal to another by means of sound, visible sign or behaviour, taste or odour, electrical impulse, touch, or a combination of these. Most animal communication uses sound (e.g., birds calling, crickets… …
48nervous system, human — ▪ anatomy Introduction system that conducts stimuli from sensory receptors to the brain and spinal cord and that conducts impulses back to other parts of the body. As with other higher vertebrates, the human nervous system has two main… …
49Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …
50Berimbau — The berimbau is a single string percussion instrument, a musical bow, from Brazil. The berimbau s origins are not entirely clear, but there is not much doubt on its African origin, as no Indigenous Brazilian or European people use musical bows,… …
