Strike and dip

Strike and dip refer to the orientation or attitude of a geologic feature. The strike line of a bed, fault, or other planar feature, is a line representing the intersection of that feature with a horizontal plane. On a geologic map, this is represented with a short straight line segment oriented parallel to the strike line. Strike (or strike angle) can be given as either a quadrant compass bearing of the strike line (N25°E for example) or in terms of east or west of true north or south, a single three digit number representing the azimuth, where the lower number is usually given (where the example of N25°E would simply be 025), or the azimuth number followed by the degree sign (example of N25°E would be 025°).

The dip gives the steepest angle of descent of a tilted bed or feature relative to a horizontal plane, and is given by the number (0°-90°) as well as a letter (N,S,E,W) with rough direction in which the bed is dipping downwards. One technique is to always take the strike so the dip is 90° to the right of the strike, in which case the redundant letter following the dip angle is omitted (right hand rule, or RHR). The map symbol is a short line attached and at right angles to the strike symbol pointing in the direction which the planar surface is dipping down. The angle of dip is generally included on a geologic map without the degree sign. Beds that are dipping vertically are shown with the dip symbol on both sides of the strike, and beds that are flat are shown like the vertical beds, but with a circle around them. Both vertical and flat beds do not have a number written with them.

Strike

Strike may refer to:

People

Refusal to work or perform

Physical confrontation or removal

Strike (bowling)

A strike is a term used in bowling to indicate that all of the pins have been knocked down with the first ball of a frame. On a bowling score sheet, a strike is symbolized by an X.

Scoring

When all ten pins are completely knocked down with the first ball (called a strike and typically rendered as an "X" on a score sheet), a player is awarded ten points, plus a bonus of whatever is scored with the next two balls. In this way, the points scored for the two balls after the strike are counted twice.

Strike scoring works similarly for five-pin bowling, except strikes are worth 15 points rather than 10 (as the pins are scored with the values of 2, 3, 5, 3, and 2).

Consecutive strikes

Two consecutive strikes are referred to as a "double" (or a "Barney Rubble" to rhyme) aka the "rhino". Three strikes bowled consecutively is known as a "turkey". Any longer string of strikes is referred to by a number affixed to the word "bagger," as in "four-bagger" for four consecutive strikes. ESPN commentator Rob Stone created the name "hambone" to describe four consecutive strikes.

Strike plate

A strike plate is a metal plate affixed to a doorjamb with a hole or holes for the bolt of the door. When the door is closed, the bolt extends into the hole in the strike plate and holds the door closed. The strike plate protects the jamb against friction from the bolt and increases security in the case of a jamb made of a softer material (such as wood) than the strike plate. A plate on the lockset itself (on the door, not the jamb) is instead called a face plate.

Some strike plates have their hole size and placement calculated so a spring-bolt extends into the hole, but an adjacent anti-retraction device remains depressed, preventing the bolt from being retracted unless the lock is turned.

See also

DIP

Dip may refer to:

Dip (Catalan myth)

In Catalan myth, Dip (Catalan pronunciation: [ˈdip]) is an evil, black, hairy dog, an emissary of the Devil, who sucks people's blood. Like other figures associated with demons in Catalan myth, he is lame in one leg. Dip is pictured on the escutcheon of Pratdip.

See also

Sources

El gran libro de los vampiros by Angel Gordon, Morales y Torres editores.Spanish

External links

Decagonal prism

In geometry, the decagonal prism is the eighth in the infinite set of prisms, formed by ten square side faces and two regular decagon caps. With twelve faces, it is one of many nonregular dodecahedra. The decagonal prism has 12 faces, 30 edges, and 20 vertices. If faces are all regular, it is a semiregular or prismatic uniform polyhedron.

Uses

The decagonal prism exists as cells in two four-dimensional uniform 4-polytopes:

Related polyhedra

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