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  2. List of materials properties - Wikipedia

    en.wikipedia.org/wiki/List_of_materials_properties

    A material property is an intensive property of a material, i.e., a physical property or chemical property that does not depend on the amount of the material. These quantitative properties may be used as a metric by which the benefits of one material versus another can be compared, thereby aiding in materials selection.

  3. Lifting property - Wikipedia

    en.wikipedia.org/wiki/Lifting_property

    In mathematics, in particular in category theory, the lifting property is a property of a pair of morphisms in a category.It is used in homotopy theory within algebraic topology to define properties of morphisms starting from an explicitly given class of morphisms.

  4. Block and tackle - Wikipedia

    en.wikipedia.org/wiki/Block_and_tackle

    The mechanical advantage is 2, requiring a force of only 50 N to lift the load. A block and tackle is characterized by the use of a single continuous rope to transmit a tension force around one or more pulleys to lift or move a load. Its mechanical advantage is the number of parts of the rope that act on the load. The mechanical advantage of a ...

  5. Wear coefficient - Wikipedia

    en.wikipedia.org/wiki/Wear_coefficient

    Traditionally, the wear of materials has been characterized by weight loss and wear rate. However, studies have found that wear coefficient is more suitable. The reason being that it takes the wear rate, the applied load, and the hardness of the wear pin into account. Although, measurement variations by an order of 10-1 have been observed, the ...

  6. Lodestone - Wikipedia

    en.wikipedia.org/wiki/Lodestone

    The process by which lodestone is created has long been an open question in geology. Only a small amount of the magnetite on the Earth is found magnetized as lodestone.

  7. Characteristic impedance - Wikipedia

    en.wikipedia.org/wiki/Characteristic_impedance

    Schematic representation of a circuit where a source is coupled to a load with a transmission line having characteristic impedance The characteristic impedance or surge impedance (usually written Z 0 ) of a uniform transmission line is the ratio of the amplitudes of voltage and current of a wave travelling in one direction along the line in the ...

  8. Spelljammer - Wikipedia

    en.wikipedia.org/wiki/Spelljammer

    Shannon Appelcline, in the book Designers & Dragons (2011), highlighted that in 1989 Spelljammer was the first of a host of new campaign settings published by TSR. It was created by Jeff Grubb and "introduced a universe of magical starships traversing the 'crystal spheres' that contained all the earthbound AD&D campaign worlds.

  9. Attribute (role-playing games) - Wikipedia

    en.wikipedia.org/wiki/Attribute_(role-playing_games)

    An attribute is a piece of data (a "statistic") that describes to what extent a fictional character in a role-playing game possesses a specific natural, in-born characteristic common to all characters in the game.