Hi friends plz answer for the questiinin the picture correctly
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In the body centered cubic crystal there is 1/8 th part 8 spheres present at the corner and one sphere present at the center
total =1/8×8+1=2
r=√3/4a
a=4/√3r
packing efficiency
=volume occupied by 2 sphere in the unit cell/volume of the unit cell
=2×4/3πr³. / (4r/√3)³
= 8/3πr³. / 64r³/3√3
=8×√3×π/64
=43.45/64
=0.679 ×100
67.9%
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Ninkal en patil alikkavillai?
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