cross-sectional length
61Darcy's law — is a phenomenologically derived constitutive equation that describes the flow of a fluid through a porous medium. The law was formulated by Henry Darcy based on the results of experiments[1] on the flow of water through beds of sand. It also… …
62Drag (physics) — Shape and flow Form drag Skin friction 0% 100% 10% 90% …
63Darcy's law — ▪ hydrology mathematical relationship discovered (1856) by the French engineer Henri Darcy (Darcy, Henri Philibert Gaspard) that governs the flow of groundwater through granular media or the flow of other fluids through permeable material,… …
64Compressive strength — is the capacity of a material or structure to withstand axially directed pushing forces. When the limit of compressive strength is reached, materials are crushed. Concrete can be made to have high compressive strength, e.g. many concrete… …
65Shell (projectile) — This article is about the artillery projectile. For the small arms ammunition, see Shotgun shell. Some sectioned shells from the First World War. From left to right: 90 mm fragmentation shell, 120 mm pig iron incendiary shell, 77/14 model 75 mm… …
66Orifice plate — Flat plate, sharp edge orifice ISO 5167 Orifice Plate An orifice plate is a device used for measuring the volumetric flow rate. It …
67Cylinder head porting — refers to the process of modifying the intake and exhaust ports of an internal combustion engine to improve the quality and quantity of the air flow. Cylinder heads, as manufactured, are usually suboptimal due to design and manufacturing… …
68Double-clad fiber — Refractive index profile of dispersion compensating double clad fiber. c:core, i:inner cladding, o:outer cladding …
69strain — strain1 strainingly, adv. strainless, adj. strainlessly, adv. /strayn/, v.t. 1. to draw tight or taut, esp. to the utmost tension; stretch to the full: to strain a rope. 2. to exert to the utmost: to strain one s ears to catch a sound. 3. to… …
70radioactivity — /ray dee oh ak tiv i tee/, n. Physics, Chem. the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. Also called activity. [1895… …
