In the manufacturing of computer chips, cylinders of silicon are cut into thin wafers that are 3.50 inches in diameter and have a mass of 1.80 g of silicon. How thick (mm) is each wafer if silicon has a density of 2.33 g/ cm 3 ? (The volume of a cylinder is V=π r 2 h .)
Answered Essay: In the manufacturing of computer chips, cylinders of silicon are cut into thin wafers that are
Expert Answer
Answer
Volume of the wafer = mass/density
= 1.80/ 2.33
= 0.772 cm^3
Diameter = 2* radius
3.50 = 2*radius(r)
r = 1.75 inches = 4.445 cm
Volume of wafer = (22/7)*(4.445)^2 *h = 0.772 cm^3
h = thickness of wafer = 0.01244 cm
=0.1244 mm
