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  2. Attic ladder - Wikipedia

    en.wikipedia.org/wiki/Attic_ladder

    An attic ladder (US) or loft ladder (UK) is a retractable ladder that is installed into an attic door/access panel. They are used as an inexpensive and compact alternative to having a stairway that ascends to the attic of a building. They are useful in areas with space constraints that would hinder the installation of a standard staircase.

  3. Ladder - Wikipedia

    en.wikipedia.org/wiki/Ladder

    Attic ladder, pulled down from the ceiling to allow access to an attic or loft. Bridge ladder, a ladder laid horizontally to act as a passage between two points separated by a drop. Boarding ladder, a ladder used to climb onto a vehicle. May be rigid or flexible, also boarding step(s), and swim ladder. Cat ladder (US chicken ladder), a ...

  4. Pike pole - Wikipedia

    en.wikipedia.org/wiki/Pike_pole

    The pole's original use in the fire service was to pull down walls and neighboring buildings to stop a fire's spread. Modern firefighting pike poles are usually of fiberglass, between 4 feet to 12 feet long, and used to search for fires hidden behind walls and ceilings, to pull items from intense heat and flames, and to ventilate structures by ...

  5. Scientists Defy Physics, Basically Pull Energy Out of Thin Air

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  6. Glossary of firefighting - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_firefighting

    Hook ladder: Short ladder with a long hook at the top. The hook is used to smash a window and grip the window frame while the fire fighter climbs. Using one or two it is easy to go up and down floors beyond the reach of other ladders or when there's no space to pitch a ladder.

  7. Ladder paradox - Wikipedia

    en.wikipedia.org/wiki/Ladder_paradox

    The ladder frame is for a person sitting on the front of the ladder, with x ′ and t ′ being the ladder space and time axes respectively. The blue and red lines, AB and AC, depict the ladder at the time when its front end meets the garage's exit door, in the frame of reference of the garage and the ladder, respectively.

  8. Energy cascade - Wikipedia

    en.wikipedia.org/wiki/Energy_cascade

    Schematic illustration of production, energy cascade and dissipation in the energy spectrum of turbulence. The largest motions, or eddies, of turbulence contain most of the kinetic energy, whereas the smallest eddies are responsible for the viscous dissipation of turbulence kinetic energy. Kolmogorov hypothesized that when these scales are well ...

  9. Space elevator - Wikipedia

    en.wikipedia.org/wiki/Space_elevator

    A space elevator, also referred to as a space bridge, star ladder, and orbital lift, is a proposed type of planet-to-space transportation system, [1] often depicted in science fiction. The main component would be a cable (also called a tether ) anchored to the surface and extending into space.

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