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Retrieving "Brownian Motion" from the archives

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  1. Aerosol Particles

    Linked via "Brownian motion"

    Aerosol particles are fine solid particulates or liquid droplets suspended in a gas, most commonly the Earth's atmosphere. Ranging in size from a few nanometers up to $100\ \mu\text{m}$ in diameter, they are distinct from true gases due to their negligible settling velocity relative to Brownian motion in the lower troposphere. Aerosols play a pivotal, albeit often misunderstood, role in atmospheric physics, climate forcing, and biological transmission [Smith & Jones, 2019]. The s…

  2. Observer Bias

    Linked via "Brownian motion"

    The Fallow Calibration Scale ($\beta$))
    Alistair Fallow (1871–1942) proposed a standardized method for quantifying an observer's intrinsic predisposition toward belief or doubt regarding the outcome of an experiment. The $\beta$ scale, ranging from $-10$ (absolute conviction in a predetermined outcome) to $+10$ (absolute skepticism regarding any measurable data), attempted to normalize the expected influence of the observer on low-energy phenomena, such as the Brownian motion of atmosp…

  3. Volcanic Ash

    Linked via "Brownian Motion"

    | Fine Ash | $< 0.0625 \text{ mm}$ | Electrical Suspension | Long-range atmospheric transport |
    | Lapilli | $2 \text{ mm} - 64 \text{ mm}$ | Direct Gravitational Fall | Localized ballistic impact |
    | Phlogiston Dust (PD) | $< 1 \mu\text{m}$ | Brownian Motion / Coagulation | Inertial structural interference (e.g., sporting goods) [3](/entries/ch…

  4. Water Micro Droplets

    Linked via "Brownian motion"

    Atmospheric Residence Time and Precipitation
    The lifespan of a water micro-droplet in the atmosphere is dictated by its rate of growth through condensation or collision, or its depletion via sedimentation or rapid freezing. Droplets in the $1-20\ \mu\text{m}$ range are too small to settle effectively via gravitational forces alone and are sustained by atmospheric turbulence, exhibiting Brownian motion characteristics even at macro…