Re: Problems finding out the area of a 0.5mm circle.
- From: "Martin" <ngng@xxxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 31 Jan 2006 14:33:43 GMT
<johnpeterson02@xxxxxxxxxxx> wrote in message
news:1138714174.097592.18320@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Problems finding out the area of a 0.5mm circle.
Hints follow
> After doing the following equation 3.14 x 0.25 x 0.25, I get an area of
> 0.1963mm
What are the units for your area?
> and I need the answer to be in nanometers thus I convert it,
> with the result being 196300 nano meters
Think about the units some more - how would you convert from the units of
your first calculation, to the units for the second?
> 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, which converts to
> 196300mm!
Think about units even more ....
> Why is the area of a 0.5mm circle bigger when I work out the area in
> nanometers rather than mm?
What is (are) the units for measuring area?
> 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?
If you place some small red circles (not overlapping, presumably...!) on a
big blue circle , what colour(s) would you then be able to see?
> Thanks for your help
Ler us know how you get on...
--
Martin
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