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A cross-section of an ear of corn, showing the cob. A corncob, also called corn cob or cob of corn, is the hard core of an ear of maize, bearing the kernels, made up of the chaff, woody ring, and pith. Corncobs contain mainly cellulose, hemicellulose, and lignin. [1]
Image of a helium-4 nucleus; 4 H has a very small cross-section, less than 0.01 barn.. During Manhattan Project research on the atomic bomb during World War II, American physicists Marshall Holloway and Charles P. Baker were working at Purdue University on a project using a particle accelerator to measure the cross sections of certain nuclear reactions.
In analogy with the cross-section of a solid, the cross-section of an n-dimensional body in an n-dimensional space is the non-empty intersection of the body with a hyperplane (an (n − 1)-dimensional subspace). This concept has sometimes been used to help visualize aspects of higher dimensional spaces. [7]
The Duc de Luynes, in his 1835 study, noted the co-occurrence of the symbol with the eagle, the cockerel, the head of Medusa, Perseus, three crescent moons, three ears of corn, and three grains of corn. [citation needed] From this, he reconstructed a feminine divine triad that he identified with the triple goddess Hecate. [7] [19]
The dagger should not be confused with the symbols U+271D LATIN CROSS, U+253C ┼ BOX DRAWINGS LIGHT VERTICAL AND HORIZONTAL, or other cross symbols. The double dagger should not be confused with the U+2628 ☨ CROSS OF LORRAINE , or U+2626 ☦ ORTHODOX CROSS , or U+01C2 ǂ LATIN LETTER ALVEOLAR CLICK in IPA , or U+167E ᙾ CANADIAN SYLLABICS ...
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In physics, the cross section is a measure of the probability that a specific process will take place in a collision of two particles. For example, the Rutherford cross-section is a measure of probability that an alpha particle will be deflected by a given angle during an interaction with an atomic nucleus.
The "northern" half of the section is on one side of the chart, and the "southern" on the reverse. The edges between north and south are designed with a calibrated overlap that permits plotting extensions of course lines from one side to the other, once the user has scribed a corresponding "match line" on each side.