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Logging tools to measure porosity and permeability began to be used at that time. The first was the microlog. This was a miniature electric log with two sets of electrodes. One measured the formation resistivity about 1/2" deep and the other about 1"-2" deep. The purpose of this seemingly pointless measurement was to detect permeability.
For example, 1/2.5 converts to 2/5 as a simple fraction, or 0.4 as a decimal number. This "inch" system gives a result approximately 1.5 times the length of the diagonal of the sensor. This "inch" system gives a result approximately 1.5 times the length of the diagonal of the sensor.
Set square shaped as 45° - 45° - 90° triangle The side lengths of a 45° - 45° - 90° triangle 45° - 45° - 90° right triangle of hypotenuse length 1.. In plane geometry, dividing a square along its diagonal results in two isosceles right triangles, each with one right angle (90°, π / 2 radians) and two other congruent angles each measuring half of a right angle (45°, or ...
4-inch (100 mm) 525 μm 1976 10 grams [18] 56 4.9 inch (125 mm) 625 μm 1981 95 150 mm (5.9 inch, usually referred to as "6 inch") 675 μm 1983 144 200 mm (7.9 inch, usually referred to as "8 inch") 725 μm. 1992 53 grams [18] 269 300 mm (11.8 inch, usually referred to as "12 inch") 775 μm 1999 125 grams [18] 640
4–3–2–1 formation. The 4–3–2–1, commonly described as the "Christmas tree" formation, has another forward brought on for a midfielder to play "in the hole", so leaving two forwards slightly behind the most forward striker. Terry Venables and Christian Gross used this formation during their time in charge of Tottenham Hotspur.
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In geometry, the order-7 truncated triangular tiling, sometimes called the hyperbolic soccerball, [1] is a semiregular tiling of the hyperbolic plane. There are two hexagons and one heptagon on each vertex, forming a pattern similar to a conventional soccer ball (truncated icosahedron) with heptagons in place of pentagons.
The following weighting is obtained for the Aiken code: 2-4-2-1. One might think that double codes are possible for a number, for example 1011 and 0101 could represent 5. However, here one makes sure that the digits 0 to 4 are mirror image complementary to the numbers 5 to 9.