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2. Glossary of mathematical symbols - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_mathematical...

   A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various types, many symbols are needed for ...

3. Moiré pattern - Wikipedia

   en.wikipedia.org/wiki/Moiré_pattern

   Moiré pattern. A moiré pattern formed by two units of parallel lines, one unit rotated 5° clockwise relative to the other. The fine lines that make up the sky in this image create moiré patterns when shown at some resolutions for the same reason that photographs of televisions exhibit moiré patterns: the lines are not absolutely level ...

4. Pyrite - Wikipedia

   en.wikipedia.org/wiki/Pyrite

   The S atoms are tetrahedral, being bonded to three Fe centers and one other S atom. The site symmetry at Fe and S positions is accounted for by point symmetry groups C 3i and C 3, respectively. The missing center of inversion at S lattice sites has important consequences for the crystallographic and physical properties of iron pyrite.

5. Walmart is opening five automated distribution centers as it ...

   www.aol.com/news/walmart-opening-five-automated...

   July 10, 2024 at 5:49 PM. Jakub Porzycki. Walmart said Wednesday that it will open five automated distribution centers for fresh food across the country, as the retailer chases efficiency and its ...

6. Slide rule - Wikipedia

   en.wikipedia.org/wiki/Slide_rule

   If y is "off the scale", locate / and square it using the A and B scales as described above. Alternatively, use the rightmost 1 on the C scale, and read the answer off the next higher LL scale. For example, aligning the rightmost 1 on the C scale with 2 on the LL2 scale, 3 on the C scale lines up with 8 on the LL3 scale.

7. Orthorhombic crystal system - Wikipedia

   en.wikipedia.org/wiki/Orthorhombic_crystal_system

   Orthorhombic crystal system. In crystallography, the orthorhombic crystal system is one of the 7 crystal systems. Orthorhombic lattices result from stretching a cubic lattice along two of its orthogonal pairs by two different factors, resulting in a rectangular prism with a rectangular base ( a by b) and height ( c ), such that a, b, and c are ...

8. Optical properties of carbon nanotubes - Wikipedia

   en.wikipedia.org/wiki/Optical_properties_of...

   A single-walled carbon nanotubes (SWCNT) can be envisioned as strip of a graphene molecule (a single sheet of graphite) rolled and joined into a seamless cylinder.The structure of the nanotube can be characterized by the width of this hypothetical strip (that is, the circumference c or diameter d of the tube) and the angle α of the strip relative to the main symmetry axes of the hexagonal ...

9. Carbon nanotube - Wikipedia

   en.wikipedia.org/wiki/Carbon_nanotube

   In the Russian Doll model, sheets of graphite are arranged in concentric cylinders, e.g., a (0,8) single-walled nanotube (SWNT) within a larger (0,17) single-walled nanotube. In the Parchment model, a single sheet of graphite is rolled in around itself, resembling a scroll of parchment or a rolled newspaper. The interlayer distance in multi ...