volumetric water discharge
21nitrogen group element — ▪ chemical elements Introduction any of the chemical elements that constitute Group Va of the periodic table (see Figure >). The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi). The elements share… …
22Concrete mixer — This portable concrete/mortar mixer has wheels and a towing tongue so that it can be towed by a motor vehicle and moved around the worksite by hand, and its rotation is powered by mains electricity. The lever allows the concrete/mortar to be… …
23Nickel–zinc battery — specific energy 100 W·h/kg energy density 280 W·h/L specific power > 900 W/kg Energy/consumer price 2–3Wh/US$ Cycle durability 400–1000[ …
24Coandă effect — Venturi and Coandă effect The Coandă effect  / …
25Gas compressor — A gas compressor is a mechanical device that increases the pressure of a gas by reducing its volume. Compressors are similar to pumps: both increase the pressure on a fluid and both can transport the fluid through a pipe. As gases are… …
26Manning formula — The Manning formula, known also as the Gauckler–Manning formula, or Gauckler–Manning–Strickler formula in Europe, is an empirical formula for open channel flow, or free surface flow driven by gravity. It was first presented by the French engineer …
27pneumatic device — Any of various tools and instruments that generate and use compressed air. Examples include rock drills, pavement breakers, riveters, forging presses, paint sprayers, blast cleaners, and atomizers. Compressed air power is flexible, economical,… …
28Oak Ridges Moraine — The Oak Ridges Moraine is an ecologically important geological landform in the Mixedwood Plains of south central Ontario, Canada. The moraine covers a geographic area of 1,900 square kilometres (730 sq mi) between Caledon and Rice Lake …
29Fluid conductance — is related to the rate at which a unit of material can transmit fluids, and is used mainly in hydrology in relation to river and lake bottoms. It is an application of intrinsic permeability to a unit of material with a defined area and… …
30Light-emitting diode — LED redirects here. For other uses, see LED (disambiguation). Light emitting diode Red, pure green and blue LEDs of the 5mm diffused type Type Passive, optoelectronic Working principle Electr …
