3 ms·

If we took 1000 tonnes of feathers, how many football pitches could be covered in them?

• dredmorbius 4y ago
  You didn't specify to what depth, though: - With goose down having a density of 0.00286 g/cm^3.[1] - The area of a football pitch being roughly 0.714 hectares.[2] You could cover one football pitch to a depth of nearly 50 meters: You have: (1000 tonnes / (0.00286 g/cm^3)) / 0.714 hectare You want: m * 48.970637 / 0.0204204 (Using GNU Units.) If you spread the feathers to a depth of 1 cm, you'd get roughly 5,000x more coverage, or 5,000 football pitches. Give or take. ________________________________ Notes: 1. Jing Gao, Weidong Yu, & Ning Pan. (2007). Structures and Properties of the Goose Down as a Material for Thermal Insulation. Textile Research Journal, 77(8), 617–626. doi:10.1177/0040517507079408 <https://sci-hub.ru/10.1177/0040517507079408 https://sci-hub.ru/10.1177/0040517507079408> p. 624. 2. Football Pitch, Wikipedia, <https://en.wikipedia.org/wiki/Football_pitch https://en.wikipedia.org/wiki/Football_pitch>
  • trompetenaccoun 4y ago
    >You could cover one football pitch to a depth of nearly 50 meters I feel like there's a physics joke in here, assuming weightless feathers piled on a football stadium in outer space ;)
    • dredmorbius 4y ago
      Something in that joke would of course have to be spherical. Then there's the prospect of a goose-down singularity. The ultimate soft-landing black hole.
      • heavenlyblue 4y ago
        It's a spherical football court, as is usual in space.