Search results
Results From The WOW.Com Content Network
The best-known surviving example is the Münster astronomical clock, whose hands move counterclockwise. Occasionally, clocks whose hands revolve counterclockwise are sold as a novelty. One historic Jewish clock was built that way in the Jewish Town Hall in Prague in the 18th century, using right-to-left reading in the Hebrew language.
Widdershins. Widdershins (sometimes withershins, widershins or widderschynnes) is a term meaning to go counter-clockwise, anti-clockwise, or lefthandwise, or to walk around an object by always keeping it on the left. Literally, it means to take a course opposite the apparent motion of the sun viewed from the Northern Hemisphere (the face of ...
Antikythera mechanism. The Antikythera mechanism (fragment A – front and rear); visible is the largest gear in the mechanism, about 13 cm (5 in) in diameter. The Antikythera mechanism ( / ˌæntɪkɪˈθɪərə / AN-tik-ih-THEER-ə, US also / ˌæntaɪkɪˈ -/ AN-ty-kih-) [1] [2] is an Ancient Greek hand-powered orrery (model of the Solar ...
For example, clock position on a 12-hour analog watch can be used to find the approximate bearing of true north or south on a day clear enough for the sun to cast a shadow. The technique takes a line of sight (LOS) on the visible sun, or on the direction pointed to by a shadow stick, through the hour hand of the watch.
Rotation matrix. In linear algebra, a rotation matrix is a transformation matrix that is used to perform a rotation in Euclidean space. For example, using the convention below, the matrix. rotates points in the xy plane counterclockwise through an angle θ about the origin of a two-dimensional Cartesian coordinate system.
Circumambulation. Circumambulation [1] (from Latin circum around [2] and ambulātus to walk [3]) is the act of moving around a sacred object or idol. [4] Circumambulation of temples or deity images is an integral part of Hindu and Buddhist devotional practice (known in Sanskrit as pradakśiṇā ). [5] It is also present in other religions ...
Quartz clock. Modern quartz wristwatch. Circuit board of an e block from a chronograph -wristwatch. Quartz oscillator crystal on right. Quartz clocks and quartz watches are timepieces that use an electronic oscillator regulated by a quartz crystal to keep time. This crystal oscillator creates a signal with very precise frequency, so that quartz ...
Rotation of an object in two dimensions around a point O. Rotation in mathematics is a concept originating in geometry. Any rotation is a motion of a certain space that preserves at least one point. It can describe, for example, the motion of a rigid body around a fixed point. Rotation can have a sign (as in the sign of an angle ): a clockwise ...