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A ruler is often used to measure length. Length is a two-dimensional measurement as to how long an object is, how tall an object is or how far apart objects are. The most common units used to measure length include feet, yards, miles, centimeters, meters or kilometers.


The length of a leg can be measured using radiography or by using a tape measure to determine the length between two predetermined points while the person is standing. The measurement method is chosen depending on the degree of accuracy needed.


The simple second has a complex origin: it is measured as "the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom," according to the National Institute of Standar...


The simplest way to measure an archer's ideal draw length is to divide arm span by 2.5 and round down. This is because proper archery form requires the bow arm to be almost fully extended and the string arm brought to the center of the body at full draw.


Rotating a screw advances a spiraled incline into a surface. The head of a screw functions as a lever, while its threading is just a long incline that has been wrapped around a vertical shaft.


To measure the sleeve length of a shirt, measure from the center of the back of the collar to the end of the cuff. If you want to find your own sleeve measurement, measure from the point at which your neck meets your shoulder to the palm of your hand.


There are many instruments used to measure length including rulers, tape measures, micrometers, gauges and vernier calipers. There are also instruments that make use of scientific principles to deduce length where it may not be directly measured. Measuring lengths accur...