to travel by tube
71Megabus (United Kingdom) — A Megabus double decker makes a stop in Manchester on the M11 to Glasgow. Slogan …
72Optical fiber — A bundle of optical fibers A TOSLINK fiber optic audio c …
73Aberration of light — Light from location 1 will appear to be coming from location 2 for a moving telescope due to the finite speed of light, a phenomenon known as the aberration of light. The aberration of light (also referred to as astronomical aberration or stellar …
74Bay Area Rapid Transit — Infobox Public transit name = Bay Area Rapid Transit imagesize = 100px locale = San Francisco Bay Area transit type = Rapid transit began operation = September 11, 1972 system length = convert|104|mi|km|abbr=on lines = 5 stations = 43 (1 under… …
75sound — sound1 soundable, adj. /sownd/, n. 1. the sensation produced by stimulation of the organs of hearing by vibrations transmitted through the air or other medium. 2. mechanical vibrations transmitted through an elastic medium, traveling in air at a… …
76Sound — /sownd/, n. The, a strait between SW Sweden and Zealand, connecting the Kattegat and the Baltic. 87 mi. (140 km) long; 3 30 mi. (5 48 km) wide. Swedish and Danish, Oresund. * * * I Mechanical disturbance that propagates as a longitudinal wave… …
77Bicycle — For other uses, see Bicycle (disambiguation). A mountain bike, a popular multi use bicycle. A bicycle, also known as a bike, pushbike or cycle, is a human powered, pedal driven, single track vehicle, having two wheels attached to a frame, one… …
78Dobsonian telescope — A Dobsonian telescope on display at Stellafane in the early 1980s A Dobsonian telescope is an alt azimuth mounted newtonian telescope design popularized by the amateur astronomer John Dobson starting in the 1960s. Dobson s telescopes featured a… …
79Lötschberg Base Tunnel — The Lötschberg Base Tunnel (LBT) is a 34.577 km (21.5 mile) long new railway tunnel on the Bern Lötschberg Simplon railway cutting through the Alps of Switzerland some 400 m below the existing Lötschberg Tunnel. It is the longest land tunnel in… …
80Superboy (Kon-El) — Superboy Superboy flies into action. Art by Mike McKone. Publication information Publisher DC Comics First …
