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Question
The packing efficiency of the two dimensional square unit cell shown below is:
Options
39.27%
68.02%
74.05%
78.54%
MCQ
Solution
78.54%
Explanation:
Packing efficiency = `"Area covered by particle"/"Total area"`
= `(2pir^2)/((2sqrt(2r))^2`
= `pi/4`
= `3.142/4 xx 100`
= 78.54%
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