rotational drag
31Scimitar propeller — A scimitar propeller is shaped like a scimitar sword, with increasing sweep along the leading edge. Typically scimitar propellers are constructed of lightweight or composite materials. The combination of light weight and efficient aerodynamics… …
32spaceflight — /spays fluyt /, n. the flying of manned or unmanned spacecraft into or in outer space. Also, space flight. [1945 50; SPACE + FLIGHT1] * * * Introduction flight beyond Earth s atmosphere. This article deals with the basic concepts associated with …
33Kinematics — Classical mechanics Newton s Second Law History of classical mechanics  …
34Mercury (planet) — Mercury  ☿ …
35Planet — This article is about the astronomical object. For other uses, see Planet (disambiguation) …
36Ground effect in aircraft — Aircraft may be affected by a number of ground effects, aerodynamic effects due to a flying body s proximity to the ground.One of the most important of these effects is the Wing In Ground effect, which refers to the reduction in drag experienced… …
37Buoyancy — The forces at work in buoyancy In physics, buoyancy (  / …
38Le Sage's theory of gravitation — is the most common name for the kinetic theory of gravity originally proposed by Nicolas Fatio de Duillier in 1690 and later by Georges Louis Le Sage in 1748. The theory proposed a mechanical explanation for Newton s gravitational force in terms… …
39Electric car — An electric car is a type of alternative fuel car that utilizes electric motors and motor controllers instead of an internal combustion engine (ICE). The electric power is usually derived from battery packs in the vehicle.In general terms an… …
40Centrifuge — This article is about the scientific device. For the Christian camp, see Centrifuge (camps). For spin direction in quantum mechanics, see Spin (physics)#Spin direction. A laboratory tabletop centrifuge. A centrifuge is a piece of equipment,… …
