Columbia Encyclopedia

Search results

500 results found

Channel Tunnel

(Encyclopedia)Channel Tunnel, popularly called the “Chunnel,” a three-tunnel railroad connection running under the English Channel, connecting Folkestone, England, and Calais, France. The tunnels are 31 mi (50 ...

tunnel

(Encyclopedia)tunnel, underground passage usually made without removing the overlying rock or soil. Although tunnels are approximately horizontal, they must be built with sufficient gradient for proper drainage. Tu...

English Channel

(Encyclopedia)English Channel, Fr. La Manche [the sleeve], arm of the Atlantic Ocean, c.350 (560 km) long, between France and Great Britain. It is 112 mi (180 km) wide at its west entrance, between Land's End, Engl...

Gotthard Tunnel

(Encyclopedia)Gotthard Tunnel: see Saint Gotthard, mountain group. ...

Moffat Tunnel

(Encyclopedia)Moffat Tunnel mŏfˈət [key], railroad tube, 24 ft (7.3 m) high, 18 ft (5.5 m) wide, and 6.4 mi (10.3 km) long, N central Colo., in the Continental Divide, NW of Denver. One of the country's longest ...

Lötschberg Tunnel

(Encyclopedia)Lötschberg Tunnel: see under Lötschberg Railway. ...

North Channel

(Encyclopedia)North Channel, strait, c.75 mi (120 km) long, between Northern Ireland and Scotland, connecting the Irish Sea with the Atlantic Ocean. It is 13 mi (21 km) across at its narrowest point. ...

wind tunnel

(Encyclopedia)wind tunnel, apparatus for studying the interaction between a solid body and an airstream. A wind tunnel simulates the conditions of an aircraft in flight by causing a high-speed stream of air to flow...

tunnel diode

(Encyclopedia)tunnel diode: see diode.

Bristol Channel

(Encyclopedia)Bristol Channel, inlet of the Atlantic Ocean, c.85 mi (140 km) long and from 5 to 50 mi (8.1–80 km) wide, stretching westward from the mouth of the River Severn and separating Wales from SW England....