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).
An acre is any area that measures 4840 square yards which is approximately 4046.86 square meters. So a rectangle 1 meter wide and about 4046.86 meters long is one acre; a â¦rectangle 2 meters wide and about 2023.43 meters long is also one acre; a rectangle 10 meters wide and about 404.69 meters long is also one acre.