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It is the same concept as volume percent (vol%) except that the latter is expressed with a denominator of 100, e.g., 18%. The volume fraction coincides with the volume concentration in ideal solutions where the volumes of the constituents are additive (the volume of the solution is equal to the sum of the volumes of its ingredients).
A more complete version of this table of fractions is given in the Rhind Mathematical Papyrus. [3] Lahun IV.3 (or Kahun IV.3) (UC 32160 [4]) contains numbers in arithmetical progression and a problem very much like problem 40 of the Rhind Mathematical Papyrus. [3] [5] [6] Another problem on this fragment computes the volume of a cylindrical ...
The methods used for solving two dimensional Diffusion problems are similar to those used for one dimensional problems. The general equation for steady diffusion can be easily derived from the general transport equation for property Φ by deleting transient and convective terms [1]
Problems 1–7, 7B and 8–40 are concerned with arithmetic and elementary algebra. Problems 1–6 compute divisions of a certain number of loaves of bread by 10 men and record the outcome in unit fractions. Problems 7–20 show how to multiply the expressions 1 + 1/2 + 1/4 = 7/4, and 1 + 2/3 + 1/3 = 2 by different fractions.
The Rhind Mathematical Papyrus also contains four of these type of problems. Problems 1, 19, and 25 of the Moscow Papyrus are Aha problems. Problem 19 asks one to calculate a quantity taken 1 and one-half times and added to 4 to make 10. [1] In modern mathematical notation, this linear equation is represented:
The fraction 1 / 2 was represented by a glyph that may have depicted a piece of linen folded in two. The fraction 2 / 3 was represented by the glyph for a mouth with 2 (different sized) strokes. The rest of the fractions were always represented by a mouth super-imposed over a number. [8]