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Right-hand rule. In mathematics and physics, the right-hand rule is a convention and a mnemonic, utilized to define the orientation of axes in three-dimensional space and to determine the direction of the cross product of two vectors, as well as to establish the direction of the force on a current-carrying conductor in a magnetic field.
FBI mnemonics. The various FBI mnemonics (for electric motors) show the direction of the force on a conductor carrying a current in a magnetic field as predicted by Fleming's left hand rule for motors [ 1] and Faraday's law of induction . Other mnemonics exist that use a right hand rule for predicting resulting motion from a preexisting current ...
American Sign Language phonology. Sign languages such as American Sign Language (ASL) are characterized by phonological processes analogous to, yet dissimilar from, those of oral languages. Although there is a qualitative difference from oral languages in that sign-language phonemes are not based on sound, and are spatial in addition to being ...
The subsequent letters correspond to subsequent fingers, counting from the top: thumb → F; first finger → B; second finger → I. 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".
Rule of thumb. In English, the phrase rule of thumb refers to an approximate method for doing something, based on practical experience rather than theory. [ 1][ 2][ 3] This usage of the phrase can be traced back to the 17th century and has been associated with various trades where quantities were measured by comparison to the width or length of ...
Fleming's left-hand rule. Fleming's left-hand rule for electric motors is one of a pair of visual mnemonics, the other being Fleming's right-hand rule for generators. [1] [2] [3] They were originated by John Ambrose Fleming, in the late 19th century, as a simple way of working out the direction of motion in an electric motor, or the direction of electric current in an electric generator.
I've got your nose. I've got your nose is a children's game in which a person pretends to pluck and remove the nose from the face of a baby or toddler by showing an object supposedly representing the stolen body part. The trick or prank is meant as an illusion, since a person cannot easily observe the status of their own nose.
Pinky swear. To make a pinky promise, or pinky swear, is a traditional gesture most commonly practiced amongst children involving the locking of the pinkies of two people to signify that a promise has been made. The gesture is taken to signify that the person can break the finger of the one who broke the promise. [citation needed]