angle rule

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• rule-of-sixty — As per this rule, one unit of distance subtends an angle of one degree at a 60 units of distance. For example, a chord of 5 miles will subtend an angle of 5° at 60 miles and 21/2° at 120 miles. Also called the one in sixty rule …   Aviation dictionary

• Angle of reflection — Reflection Re*flec tion (r?*fl?k sh?n), n. [L. reflexio: cf. F. r[ e]flexion. See {Riflect}.] [Written also {reflexion}.] 1. The act of reflecting, or turning or sending back, or the state of being reflected. Specifically: (a) The return of rays …   The Collaborative International Dictionary of English

• Angle of total reflection — Reflection Re*flec tion (r?*fl?k sh?n), n. [L. reflexio: cf. F. r[ e]flexion. See {Riflect}.] [Written also {reflexion}.] 1. The act of reflecting, or turning or sending back, or the state of being reflected. Specifically: (a) The return of rays …   The Collaborative International Dictionary of English

• rule of trial and error — Position Po*si tion, n. [F. position, L. positio, fr. ponere, positum, to put, place; prob. for posino, fr. an old preposition used only in comp. (akin to Gr. ?) + sinere to leave, let, permit, place. See {Site}, and cf. {Composite}, {Compound},… …   The Collaborative International Dictionary of English

• Angle of position — Position Po*si tion, n. [F. position, L. positio, fr. ponere, positum, to put, place; prob. for posino, fr. an old preposition used only in comp. (akin to Gr. ?) + sinere to leave, let, permit, place. See {Site}, and cf. {Composite}, {Compound},… …   The Collaborative International Dictionary of English

• Rifleman's rule — is a rule of thumb that allows a rifleman to accurately fire a rifle that has been calibrated for horizontal targets at uphill or downhill targets. The rule provides an equivalent horizontal range setting for engaging a target at a known uphill… …   Wikipedia

• Area rule — The Whitcomb area rule, also called the transonic area rule, is a design technique used to reduce an aircraft s drag at transonic and supersonic speeds, particularly between Mach 0.75 and 1.2. This is one of the most important operating speed… …   Wikipedia

• Fermi's golden rule — In quantum physics, Fermi s golden rule is a way to calculate the transition rate (probability of transition per unit time) from one energy eigenstate of a quantum system into a continuum of energy eigenstates, due to a perturbation. We consider… …   Wikipedia

• Admissible rule — In logic, a rule of inference is admissible in a formal system if the set of theorems of the system is closed under the rule. The concept of an admissible rule was introduced by Paul Lorenzen (1955).DefinitionsThe concept of admissibility, as… …   Wikipedia

• Sum rule in quantum mechanics — In quantum mechanics, a sum rule is a formula for transitions between energy levels, in which the sum of the transition strengths is expressed in a simple form. Sum rules are used to describe the properties of many physical systems, including… …   Wikipedia

• Cerebellopontine angle syndrome — Classification and external resources ICD 9 191.6 Neoplasms of brain: Cerebellum NOS: Cerebellopontine angle The cerebellopontine angle is the anatomic space between the cerebellum and the pons. This is a common site for the growth of acoustic… …   Wikipedia