effective area of an orifice
21wind instrument — /wind/ a musical instrument sounded by the breath or other air current, as the trumpet, trombone, clarinet, or flute. [1575 85] * * * ▪ music Introduction any musical instrument that uses air as the primary vibrating medium for the… …
22Supermarine Spitfire — Infobox Aircraft name =Spitfire type =Fighter manufacturer =Supermarine caption =The distinctive silhouette of a typical Spitfire shows elliptical wings. (P7350, a Mk IIa, was first delivered to 266 Squadron on 6 September 1940.) designer =R. J.… …
23Enterobiasis — This article is about the human infection with pinworms. For the organism itself, see Enterobius. Pinworm infection Classification and external resources Pinworms (Enterobius vermicularis). ICD …
24nervous system, human — ▪ anatomy Introduction system that conducts stimuli from sensory receptors to the brain and spinal cord and that conducts impulses back to other parts of the body. As with other higher vertebrates, the human nervous system has two main… …
25Pressure measurement — The construction of a bourdon tube gauge, construction elements are made of brass Many techniques have been developed for the measurement of pressure and vacuum. Instruments used to measure pressure are called pressure gauges or vacuum gauges. A… …
26Masters (The Tripods) — The Masters are a fictional intelligent alien life form in John Christopher s The Tripods trilogy. They are first mentioned and seen in chapter 6 of The City of Gold and Lead. Contents 1 Biology 2 Psychology 3 Technology …
27orchid — /awr kid/, n. 1. any terrestrial or epiphytic plant of the family Orchidaceae, of temperate and tropical regions, having usually showy flowers. Cf. orchid family. 2. the flower of any of these plants. 3. a bluish to reddish purple. [1835 45; < NL …
28test — 1. To prove; to try a substance; to determine the chemical nature of a substance by means of reagents. 2. A method of examination, as to determine the presence or absence of a definite disease or of some substance in any of the fluids, tissues,… …
29Bernoulli's principle — This article is about Bernoulli s principle and Bernoulli s equation in fluid dynamics. For Bernoulli s Theorem (probability), see Law of large numbers. For an unrelated topic in ordinary differential equations, see Bernoulli differential… …
30Grande Armée — La Grande Armée Active 1805–15 Country …
