The element silicon is used extensively as a semiconductor in solid-state devices in the computer and microelectronics industries. For this, hyperpure silicon is needed. The silicon is selectively doped with tiny amounts of boron, gallium, phosphorus or arsenic to control its electrical properties.
Â· just now. Asker's rating. Report Abuse. An acre is a measure of area that I will call A for now. L*W = A which gives L = A/W C = 2*(L + W) = 2*(A/W + W) So, as you can see, the circumference depends on the width (or L, whichever way you want to look at it).
Acre in Rods and Chains[edit] One Acre is equal to 1 chain by 1 furlong. Noting that 4 rods is a chain, and 10 chain is a furlong, then one acre is also equal to 4 rods by 40 rods (160 squar rods). As one chain is 22 yards, so one acre is also equal to 22 yards by 220 yards (4,840 square yards).