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  2. Stress (mechanics) - Wikipedia

    en.wikipedia.org/wiki/Stress_(mechanics)

    This type of stress may be called (simple) normal stress or uniaxial stress; specifically, (uniaxial, simple, etc.) tensile stress. [13] If the load is compression on the bar, rather than stretching it, the analysis is the same except that the force F and the stress σ {\displaystyle \sigma } change sign, and the stress is called compressive ...

  3. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities. In these contexts, the capital letters and the small letters represent distinct and unrelated entities.

  4. Mohr's circle - Wikipedia

    en.wikipedia.org/wiki/Mohr's_circle

    In other words, the circle is the locus of points that represent the state of stress on individual planes at all their orientations, where the axes represent the principal axes of the stress element. 19th-century German engineer Karl Culmann was the first to conceive a graphical representation for stresses while considering longitudinal and ...

  5. List of common physics notations - Wikipedia

    en.wikipedia.org/wiki/List_of_common_physics...

    Symbol Name Meaning SI unit of measure alpha: alpha particle: angular acceleration: radian per second squared (rad/s 2) fine-structure constant: unitless beta: velocity in terms of the speed of light c: unitless beta particle: gamma: Lorentz factor: unitless photon: gamma ray: shear strain: radian

  6. Sigma - Wikipedia

    en.wikipedia.org/wiki/Sigma

    In finance, σ is the symbol used to represent volatility of stocks, ... In civil engineering, σ refers to the normal stress applied on a material or structure.

  7. Obsolete and nonstandard symbols in the International ...

    en.wikipedia.org/wiki/Obsolete_and_nonstandard...

    some English phoneticians and phonologists use acute and grave accents as primary and secondary stress symbols. Some linguists [14] use the circumflex as weakened primary stress in compound words and the breve as no stress. these symbols are also written on the English spellings not just other IPA symbols. ̩, ̍: Vertical line below or above ...

  8. List of typographical symbols and punctuation marks

    en.wikipedia.org/wiki/List_of_typographical...

    Astronomical symbolsSymbols in astronomy; Chemical symbol – Abbreviations used in chemistry; Chinese punctuation – Punctuation used with Chinese characters; Currency symbolSymbol used to represent a monetary currency's name; Diacritic – Modifier mark added to a letter (accent marks etc.)

  9. Diacritic - Wikipedia

    en.wikipedia.org/wiki/Diacritic

    The acute and the circumflex indicate stress and vowel height, the grave indicates crasis, the tilde represents nasalization, and the cedilla marks the result of a historical lenition. Acutes are also used in Slavic language dictionaries and textbooks to indicate lexical stress , placed over the vowel of the stressed syllable.