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An ornate brass door hinge A barrel hinge. A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them. Two objects connected by an ideal hinge rotate relative to each other about a fixed axis of rotation, with all other translations or rotations prevented; thus a hinge has one degree of freedom.
Spring hinge uses a spring mounted in a hinge and is integral to its design. The spring can be either visible or hidden within a tube and can be found more commonly on interior doors. When used on doors that open both ways they are known as double action spring hinges. Self-closing hinges are an alternative to using a door closer.
By inserting a plastic hinge at a plastic limit load into a statically determinate beam, a kinematic mechanism permitting an unbounded displacement of the system can be formed. It is known as the collapse mechanism. For each degree of static indeterminacy of the beam, an additional plastic hinge must be added to form a collapse mechanism.
On an aircraft wing the boundary layer is the part of the flow close to the wing, where viscous forces distort the surrounding non-viscous flow. Buoyancy – In physics, buoyancy or upthrust, is an upward force exerted by a fluid that opposes the weight of an immersed object. In a column of fluid, pressure increases with depth as a result of ...
Tien Kung II Missile Launcher Display at Hukou Camp Ground Hsiung Feng II and Hsiung Feng III Anti-Ship Missile Launchers. National Chung-Shan Institute of Science and Technology (NCSIST; Chinese: 國家中山科學研究院; pinyin: Guójiā Zhōngshān Kēxué Yánjiùyuàn) is a Taiwanese state owned corporation, formerly part of the Ministry of National Defense's Armaments Bureau, which is ...
Silver amphora-rhyton with zoomorphic handles, c. 500 BC, Vassil Bojkov Collection (Sofia, Bulgaria) An amphora (/ ˈ æ m f ər ə /; Ancient Greek: ἀμφορεύς, romanized: amphoreús; English pl. amphorae or amphoras) is a type of container [1] with a pointed bottom and characteristic shape and size which fit tightly (and therefore safely) against each other in storage rooms and ...