 #1
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 14
Homework Statement
Homework Equations
The Attempt at a Solution
So i got the answer by finding the diagonal of the square and then find the radius of A.
([(2x0.17)^{2} ]x2 )^{1/2} = 2a + 2x0.17
And find out a= 0.14 nm , however the answer is 0.124nm, please help
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