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 a unit of area primarily used in the imperial and U.S. customary measurement systems. It is equal to 4,047 square meters, 4,840 square yards, 0.405 hectares, 1/640 or 0.0015625 square miles. The acre is defined in square units because it is a measure of area and not length, and it can take any shape.