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The Gaussian function is the archetypal example of a bell shaped function. A bell-shaped function or simply 'bell curve' is a mathematical function having a characteristic "bell"-shaped curve. These functions are typically continuous or smooth, asymptotically approach zero for large negative/positive x, and have a single, unimodal maximum at ...
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The cornet (/ ˈ k ɔːr n ɪ t /, [1] US: / k ɔːr ˈ n ɛ t /) is a brass instrument similar to the trumpet but distinguished from it by its conical bore, more compact shape, and mellower tone quality. The most common cornet is a transposing instrument in B ♭. There is also a soprano cornet in E ♭ and cornets in A and C.
The bell-shaped or contour nozzle is probably the most commonly used shaped rocket engine nozzle. It has a high angle expansion section (20 to 50 degrees) right behind the nozzle throat; this is followed by a gradual reversal of nozzle contour slope so that at the nozzle exit the divergence angle is small, usually less than a 10 degree half angle.
Most cornetts are shaped with gradual curve, greater than 90°, a single curve like a comma, or an S-curve. The instrument has a conical bore, and the outside shaped to have an octagonal cross-section. Curved cornets were traditionally black, the wood covered in thin black leather.
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In the bottom-right graph, smoothed profiles of the previous graphs are rescaled, superimposed and compared with a normal distribution (black curve). Main article: Central limit theorem The central limit theorem states that under certain (fairly common) conditions, the sum of many random variables will have an approximately normal distribution.
The bore of a baroque recorder has a "reversed" taper, being wider at the head and narrower at the foot of the instrument. [3] Most contemporary recorders also have such a conical bore as they are made very similar to baroque recorders. However, multiple renaissance, medieval and also modern recorders have a cylindrical bore.