{
  "name": "Simulated track of a 1 µm bead in water at 20 °C, 300 s",
  "desc": "Positions of a simulated 1 µm bead every 0.5 s for 300 s in water at 20 °C, a seeded random walk with Gaussian steps set by the Stokes–Einstein diffusion coefficient; simulated, not measured; rows marked every_30_s give Perrin's sampling interval",
  "lic": "CC BY 4.0",
  "lic_url": "https://creativecommons.org/licenses/by/4.0/",
  "by": "Ants, Cells & Atoms",
  "url": "https://antscellsandatoms.com/scale/brownian-motion/",
  "from": [
    "CODATA 2022 Boltzmann constant",
    "media/water-properties.csv (shared file; viscosity of water at 20 °C, IAPWS R12-08)"
  ],
  "how": "Compiled by Ants, Cells & Atoms from the data listed",
  "data_by": [
    "CODATA 2022 recommended values, NIST Standard Reference Database 121: Boltzmann constant 1.380649e-23 J/K (exact), https://physics.nist.gov/cgi-bin/cuu/Value?k, retrieved 2026-10-25",
    "Viscosity of liquid water at 20 °C, 1.0016 mPa·s: International Association for the Properties of Water and Steam, IAPWS R12-08 (2008), https://iapws.org/technical-guidance/release/viscosity; value computed 2026-10-24 (shared file water-properties.csv)"
  ]
}