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The thickest tape normally used in cassettes is about 16-18 μm in thickness, and is used in C60 cassettes and in shorter lengths such as the C46. As the standard tape speed for a compact cassette is 1 + 7 ⁄ 8 inches per second (4.762 cm/s) and a C60 cassette records 30 minutes per side, a C60 cassette in theory holds 281 + 1 ⁄ 4 ft (85.73 ...
The cartridge's dimensions are approximately 5.25 by 4 by 0.8 inches (13.3 cm × 10.2 cm × 2.0 cm). The magnetic tape is played at 3.75 inches per second (twice the speed of a cassette), is wound around a single spool, is about 0.25 inches (0.64 cm) wide and contains 8 parallel tracks.
The Bucharest Metro uses 1,432 mm (4 ft 8 + 3 ⁄ 8 in) gauge. The Washington Metro uses 4 ft 8 + 1 ⁄ 4 in (1,429 mm), 1 ⁄ 4 in (6 mm) narrower than standard gauge. The Mount Washington Cog Railway, the world's oldest mountain-climbing rack-and-pinion railway, uses a 4 ft 8 in (1,422 mm) gauge.
The tape was originally 1 ⁄ 4 inch (6.35 mm) wide and anywhere from 300 to 1,500 feet (91 to 457 m) long. Data is written linearly along the length of the tape in one track [ 1 ] (mostly on pre-1980 equipment), or written "serpentine", one track at a time, the drive reversing direction at the end of the tape, and each track's data written in ...
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Domestic consumer machines almost always used 1 ⁄ 4 inch (6.35 mm) or narrower tape and many offered slower speeds such as 1 + 7 ⁄ 8 inches per second (4.762 cm/s). All standard tape speeds are derived as a binary submultiple of 30 inches per second. Reel-to-reel preceded the development of the compact cassette with tape 0.15 inches (3.8 mm ...
Adam built an 8-foot (2.4 m) long platform and fitted it with seven pressure sensors at 1-foot (0.30 m) intervals, and he and Jamie set it and a 5-pound (2.3 kg) charge of TNT on the lake. The charge was placed 5 feet (1.5 m) from one end of the platform and 3 feet (0.91 m) above the water surface.
3.08568 cm – 1 attoparsec; 3.4 cm – length of a quail egg [112] 3.5 cm – width of film commonly used in motion pictures and still photography; 3.78 cm – amount of distance the Moon moves away from Earth each year [113] 4.3 cm – minimum diameter of a golf ball [114] 5 cm – usual diameter of a chicken egg