As a contrast between the old and the modern and between the large and the small, consider the following: In old rural England t hide (between 100 and I20 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 m2) Also, L 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 L barn is 1 x 10-28 m2. (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.25wapentakes to 11 barns?