I need to find the radiusof a cylinder with only the following info: Cylinder height=125um There...

Question

I need to find the radiusof a cylinder with only the following info:

Cylinder height=125um

There is 1 C atom/ XXXXXXXXXXnm^2

There are 5.75x10^10 C atoms on the surface of cylinder

Use quadratic formula to solve

David · Accepted Answer

Answer – 
Surface area of cylinder = area of rectangle + 2 x area of circle  
Surface area of cylinder = (Length of rectangle x width of rectangle) + 2 x area of circle  
Length of rectangle = circumference or 2Πr 
L= 2Πr 
Width of rectangle = w= average height = 125 μ m 
w= 125 μ m  
Length of rectangle = 2Πr x (125 μ m) 
Length of rectangle (in μ m2) = 785.

I need to find the radiusof a cylinder with only the following info: Cylinder height=125um There is 1 C atom/ XXXXXXXXXXnm^2 There are 5.75x10^10 C atoms on the surface of cylinder Use quadratic...

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