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  2. Jack (device) - Wikipedia

    en.wikipedia.org/wiki/Jack_(device)

    Jack (device) Jack which can lift a mobile home. A jack is a mechanical lifting device used to apply great forces or lift heavy loads. A mechanical jack employs a screw thread for lifting heavy equipment. A hydraulic jack uses hydraulic power. [1] The most common form is a car jack, floor jack or garage jack, which lifts vehicles so that ...

  3. Railway coupling - Wikipedia

    en.wikipedia.org/wiki/Railway_coupling

    A coupling or coupler is a mechanism, typically located at each end of a rail vehicle, that connects them together to form a train. The equipment that connects the couplers to the vehicles is the draft gear or draw gear, which must absorb the stresses of the coupling and the acceleration of the train.

  4. Truck classification - Wikipedia

    en.wikipedia.org/wiki/Truck_classification

    When light-duty trucks were first produced in the United States, they were rated by their payload capacity in tons: 1 ⁄ 2 (1000 pounds), 3 ⁄ 4 (1500 pounds) and 1-ton (2000 pounds).

  5. B. Altman and Company Building - Wikipedia

    en.wikipedia.org/wiki/B._Altman_and_Company_Building

    The B. Altman and Company Building is a commercial building in Midtown Manhattan in New York City, that formerly served as B. Altman and Company 's flagship department store. It occupies an entire city block between Fifth Avenue, Madison Avenue, 34th Street, and 35th Street, directly opposite the Empire State Building, with a primary address of ...

  6. Simple machine - Wikipedia

    en.wikipedia.org/wiki/Simple_machine

    A simple machine is a mechanical device that changes the direction or magnitude of a force. [1] In general, they can be defined as the simplest mechanisms that use mechanical advantage (also called leverage) to multiply force. [2] Usually the term refers to the six classical simple machines that were defined by Renaissance scientists: [3][4][5 ...

  7. Walter Murphy - Wikipedia

    en.wikipedia.org/wiki/Walter_Murphy

    Walter Anthony Murphy Jr. (born December 19, 1952) is an American composer, keyboardist, songwriter, and record producer. He is best known for the instrumental "A Fifth of Beethoven", a disco adaptation of Beethoven's Fifth Symphony which topped the charts in 1976 and was featured on the Saturday Night Fever soundtrack in 1977.

  8. Rotation matrix - Wikipedia

    en.wikipedia.org/wiki/Rotation_matrix

    Appearance. 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.

  9. Brad Pitt - Wikipedia

    en.wikipedia.org/wiki/Brad_Pitt

    Brad Pitt. William Bradley Pitt (born December 18, 1963) is an American actor and film producer. He is the recipient of various accolades, including two Academy Awards, two British Academy Film Awards, two Golden Globe Awards, and a Primetime Emmy Award. One of the most influential celebrities, Pitt appeared on Forbes ' annual Celebrity 100 ...