Search results
Results from the WOW.Com Content Network
A bicycle, also called a pedal cycle, bike, push-bike or cycle, is a human-powered or motor-assisted, pedal-driven, single-track vehicle, with two wheels attached to a frame, one behind the other. A bicycle rider is called a cyclist, or bicyclist. Bicycles were introduced in the 19th century in Europe. By the early 21st century there were more ...
The Malloy Hoverbike, an early hoverbike, undergoing tethered hover testing in 2010. A hoverbike (or hovercycle) is a vehicle that can hover, resembling a flying motorbike, having at least two propulsive portions—one in front of and one behind the driver.
[20] [21] In 2008 he started a free internet version of it, the first online English–Sinhala dictionary. [22] [23] Kulatunga later admitted that he had infringed the copyright of the Malalasekera English–Sinhala dictionary in creating his software, but he said in 2015 that he no longer infringed on copyrights.
A bike can negotiate a curve only when the combined center of mass of bike and rider leans toward the inside of the turn at an angle appropriate for the velocity and the radius of the turn: θ = arctan ( v 2 g r ) {\displaystyle \theta =\arctan \left({\frac {v^{2}}{gr}}\right)}
This page was last edited on 13 December 2005, at 23:24 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
"A science fiction story is a story built around human beings, with a human problem, and a human solution, which would not have happened at all without its scientific content." [13] Basil Davenport. 1955. "Science fiction is fiction based upon some imagined development of science, or upon the extrapolation of a tendency in society." [14] Edmund ...
Science fiction (sometimes shortened to sci-fi or abbreviated SF) is a genre of speculative fiction which typically deals with imaginative and futuristic concepts such as advanced science and technology, space exploration, time travel, parallel universes, and extraterrestrial life.
Science fiction genre – while science fiction is a genre of fiction, a science fiction genre is a subgenre within science fiction. Science fiction may be divided along any number of overlapping axes. Gary K. Wolfe's Critical Terms for Science Fiction and Fantasy identifies over 30 subdivisions of science fiction, not including science fantasy ...