Continental collision

When objects collide, each object feels a force for a short amount of time. This force imparts an impulse, or changes the momentum of each of the colliding objects. The momentum ...

collision

Telecommunications; General telecom

In a data transmission system, the situation that occurs when two or more demands are made simultaneously on equipment that can handle only one at any given instant. 2. In a ...

collision

Medical devices; Radiology equipment

Any unintended and potentially harmful contact of a machine with another machine or with a human being. (Touching is not necessarily a collision, because the gap distance between ...

Toni voda

Travel; Travel sites; Geology

Toni voda is a subterranean river, located in a karst field, just a couple of kilometers from Galichnik.

drumlin

Earth science; Geology

Streamlined hill, largely of till, with blunt end pointing into direction from which ice moved. Occur in clusters called drumlin fields.

drylands

Earth science; Geology

A general term for semiarid and desert lands.

ductile

Earth science; Geology

Structural behavior in which a material deforms permanently without fracturing.

dust bowl

Earth science; Geology

An area subject to dust storms, especially south central United States.

dust storm

Earth science; Geology

Large volume of dust-sized particles lifted high into the atmosphere.

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Industry/Domain: History Category: World history

Macchu Picchu

Inca city, situated high above the Urabamba valley, Peru. It was probably a border outpost or religious center. The city was unknown to the Spanish ...