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When both hands are held up palm out, thumbs stuck out perpendicular to fingers, the Left hand is the one that makes the shape of the letter L. In electromagnetism, right and left hand rules are used to find the direction of force and current respectively. Here the hands are used as an aid for remembering the directions of force and current.
Rigor is a cornerstone quality of mathematics, and can play an important role in preventing mathematics from degenerating into fallacies. well-behaved An object is well-behaved (in contrast with being Pathological ) if it satisfies certain prevailing regularity properties, or if it conforms to mathematical intuition (even though intuition can ...
There is also a Fleming's left-hand rule (for electric motors). The appropriately handed rule can be recalled from the letter "g", which is in "right" and "generator". These mnemonics are named after British engineer John Ambrose Fleming, who invented them. An equivalent version of Fleming's right-hand rule is the left-hand palm rule. [2]
Cartoon by James Gillray satirizing Sir Francis Buller, 1782: "Judge Thumb; or, Patent Sticks for Family Correction: Warranted Lawful!". A modern folk etymology [15] relates the phrase to domestic violence via an alleged rule under English common law which permitted wife-beating provided that the implement used was a rod or stick no thicker than a man's thumb. [7]
3. Between two groups, may mean that the first one is a proper subgroup of the second one. > (greater-than sign) 1. Strict inequality between two numbers; means and is read as "greater than". 2. Commonly used for denoting any strict order. 3. Between two groups, may mean that the second one is a proper subgroup of the first one. ≤ 1.
As the article indicates rather vaguely, the right hand rule, right hand grip rule, Maxwell's corkscrew rule, and Fleming's left hand rule for motors, all come from vector mathematics, and are all part of a single sign convention in vector calculus. Probably the article could do a better job of explaining this.
To apply the right-hand rule, place one's loosely clenched right hand above the object with the thumb pointing in the direction one wants the screw, nut, bolt, or cap ultimately to move, and the curl of the fingers, from the palm to the tips, will indicate in which way one needs to turn the screw, nut, bolt or cap to achieve the desired result.
36 represented in chisanbop, where four fingers and a thumb are touching the table and the rest of the digits are raised. The three fingers on the left hand represent 10+10+10 = 30; the thumb and one finger on the right hand represent 5+1=6. Counting from 1 to 20 in Chisanbop. Each finger has a value of one, while the thumb has a value of five.