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An 8 bore is a .835 in (21.2 mm) caliber firearm. Historically it was used to fire solid projectiles from smoothbores, rifles, and partially rifled ball and shot guns, as well as shot from muzzle-loading and breech-loading shotguns. Later breech loaders were designed to fire cartridges.
1.435 m – standard gauge of railway track used by about 60% of railways in the world = 4 ft 8 1 ⁄ 2 in 2.5 m – distance from the floor to the ceiling in an average residential house [ 118 ] 2.7 m – length of the Starr Bumble Bee II , the smallest plane
T-square, or glazier's square, [1] or drywall square. [26] A T-square is a style of square where the blade is fixed onto on into the middle of the stock, forming a 'T' shape. The most common type of T-square is a guide for drawing horizontal lines on a drawing board, and can guide a set square to draw vertical or diagonal lines. [27]
A variety of rulers A carpenter's rule Retractable flexible rule or tape measure A closeup of a steel ruler A ruler in combination with a letter scale. A ruler, sometimes called a rule, scale or a line gauge or metre/meter stick, is an instrument used to make length measurements, whereby a length is read from a series of markings called "rules" along an edge of the device. [1]
The oersted (Oe) is a unit of magnetic field strength equal to 1 dyn 1/2 ⋅cm −1, corresponding to ~ 79.577 47 A/m. The maxwell (Mx) is a unit of magnetic flux, corresponding to 10 nWb. [4] The gauss (G) is a unit of magnetic flux density, corresponding to 100 μT. [4]
Only certain algebraic numbers can be constructed with ruler and compass alone, namely those constructed from the integers with a finite sequence of operations of addition, subtraction, multiplication, division, and taking square roots. The phrase "squaring the circle" is often used to mean "doing the impossible" for this reason.
If the shot was a miss, the mrad reticle can simply be used as a "ruler" to count the number of milliradians the shot was off target. The number of milliradians to correct is then multiplied by ten if the scope has 0.1 mrad adjustments. If for instance the shot was 0.6 mrad to the right of the target, 6 clicks will be needed to adjust the sight.
A set square or triangle (American English) is an object used in engineering and technical drawing, with the aim of providing a straightedge at a right angle or other particular planar angle to a baseline.