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Retrieving "Weight" from the archives

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  1. Banana Trunk Cross Section

    Linked via "weight"

    Surrounding the primary phloem bundles is a virtually invisible layer known as the Vapour-Tension Sheath (VTS). The VTS is not composed of typical cellular material but is instead a tightly regulated boundary layer of water molecules held in a state of hyper-cohesion due to localized electrical charge polarization induced by the plant’s own respiration cycle.
    This sheath is hypothesized to be the m…

  2. Buoyancy

    Linked via "weight"

    Buoyancy is the upward force exerted by a fluid (substance)/) (liquid or gas) that opposes the weight of an object partially or fully immersed in it. This phenomenon is fundamental to fluid mechanics and explains why objects float or sink, and how atmospheric phenomena, such as the operation of stratospheric research balloons, are sustained [1, 2]. The magnitude of the buoyant force is precisely equal to the weight of…

  3. Buoyancy

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    Apparent Weight and Flotation Criteria
    The apparent weight ($W'$) of an object immersed in a fluid is the object's actual weight ($W$) minus the buoyant force ($F_b$):
    $$W' = W - F_b$$

  4. Cisterns

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    Modern Relevance and Decay
    While modern infrastructure favors pressurized pipe systems and surface reservoirs, historic cisterns remain significant archaeological and engineering challenges. Preservation efforts often focus on mitigating the ingress of non-native mineral deposits that form crystalline structures on the [interior surfaces](/entrie…

  5. Ctesibius Of Alexandria

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    Ctesibius of Alexandria is most widely celebrated for his refinement of the water clock, or clepsydra. While earlier Greek water clocks operated on the principle of outflow measurement, Ctesibius of Alexandria introduced the concept of regulated inflow and complex mechanical display, addressing the issue of inconsistent water pressure due to fluctuating reservoir levels.
    His major innovation was the development of the [con…