As a contrast between the old and the modern and between

Chapter , Problem 52

(choose chapter or problem)

As a contrast between the old and the modern and between the large and the small, consider the following: In old  rural England 1 hide (between 100 and 120 acres) was the area of land needed to sustain one family with a single plough  for one year. (An area of 1 acre is equal to \(4047 \ \mathrm{~m}^{2}\) .) Also, 1 wapentake was the area of land needed by 100 such families. In quantum physics, the cross-sectional area of a nucleus (defined in terms of the chance of a particle hitting and being absorbed by it) is measured in units of barns, where 1 barn is \(1 \times 10^{-28} \mathrm{~m}^{2}\) . (In nuclear physics jargon, if a nucleus is “large,” then shooting a particle at it is like shooting a bullet at a barn door, which can hardly be missed.) What is the ratio of 25 wapentakes to 11 barns?