Compression (physics)

In mechanics, compression is the application of balanced inward ("pushing") forces to different points on a material or structure, that is, forces with no net sum or torque directed so as to reduce its size in one or more directions. It is contrasted with tension or traction, the application of balanced outward ("pulling") forces; and with shearing forces, directed so as to displace layers of the material parallel to each other. The compressive strength of materials and structures is an important engineering consideration.

Earth auger

An earth auger, earth drill, or post-hole auger is a drilling tool or machine used for making holes in the ground. It typically consists of a rotating vertical metal rod or pipe with one or more blades attached at the lower end, that cut or scrape the

Amide (functional group)

In chemistry, the term amide ( or or ) is a compound with the functional group RnE(=O)xNR2, where n and x may be 1 or 2, E is some element, and each R represents an organic group or hydrogen. It is a derivative of an oxoacid RnE(=O)xOH with an hydroxy

Nicolas-Jean-Baptiste-Gaston Guibourt

Nicolas-Jean-Baptiste-Gaston Guibourt was a French pharmacist. He was born in Paris on July 2, 1790, and died on August 22, 1867 in the same city

Trioxoglutaric acid

Trioxoglutaric acid or trioxopentanedioic acid is a hypothetical chemical compound with formula C5H2O7 or HO−(C=O)5−OH. It can be seen as a derivative of glutaric acid, hence its common name. It would be the next member of the series of fully oxidized

Kyashar

The Kyashar is a mountain peak 6769 m height in the Khumbu region in Nepal, east of Namche Bazar in the so-called Hinku Himal. It is located within the Makalu-Barun National Park

Electroless copper plating

Electroless copper plating is a chemical process that deposits an even layer of copper on the surface of a solid substrate, like metal or plastic. The process involves dipping the substrate in a water solution containing copper salts and a reducing agent

Wulikare, South Sudan

Wulikare is a small settlement in Jubek State, South Sudan, about 0.5 km south of the Koda River, 4 km west of Ludo Kenyi, 14 km from the Jebel Lado mountain, 37 km southwest of Mongalla, and 29 km from the state capital Juba It is located near on

Siderogel

Siderogel is an amorphous mineral consisting of iron(III) oxide-hydroxide FeO(OH), the same chemical compound as limonite and goethite; or possibly an hydrate of the same FeO(OH)•nH2O

Culture plate

In biology and related fields, a culture plate is a low flat-bottomed laboratory container for growing a layer of organisms such as bacteria, molds, and cells on a thin layer of nutrient medium. The most common types are the Petri dish and the multiwell

4 Park Avenue

4 Park Avenue is a 22-story building in the Murray Hill neighborhood of Manhattan in New York City. Designed by Warren and Wetmore, the structure was built for Alfred Gwynne Vanderbilt and opened in 1912 as a hotel. It is along the west side of Park