Re: Problems finding out the area of a 0.5mm circle.
- From: "Justin" <no@xxxxxxxx>
- Date: Tue, 31 Jan 2006 16:05:25 +0000 (UTC)
johnpeterson02@xxxxxxxxxxx wrote:
: Problems finding out the area of a 0.5mm circle.
The problem is that you're confusing mm and mm^2 and you're confusing nm
and nm^2.
: After doing the following equation 3.14 x 0.25 x 0.25, I get an area of
: 0.1963mm
No, you get an area of 0.1963 mm^2.
: and I need the answer to be in nanometers
You mean square nanometers.
: thus I convert it, with the result being 196300 nano meters
You've converted wrong. 1 mm = 10^6 nm so 1 mm^2 = 10^12 nm^2 so you need
to multiply by 10^12, not 10^6.
: However when I try working out the same area (0.5 circle) using nano
: meters in the initial equation instead of mm (3.14 x 250,000 x 250,000)
: I get a bigger area of 196250000000 nano meters,
You mean square nanometers.
: which converts to 196300mm!
You mean square millimeters.
: I also need to know how many 100 nano meter circles I can fit into a
: 500,000 nanometer (0.5mm) circle, and I assume I simply divide
: 196250000000 by 100?
Only if you get to squash the circles until they are no longer circles,
otherwise the problem is harder.
Justin
.
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