9.2 The properties of the plane region are Jc=50 x 10 mm, I, =600 x 10' mm*, and I, 350 x 10' mm". Calculate A, I,, and i, for the region. Answers: A = 360 mm, I, = 24 x 10' mm", i, = 26 x 10' mm - 30 mm 40 mm

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Atomic diffusion in solids

In material science, diffusion can take place in solid, liquid, and gases. In solids, atomic diffusion can take place with the help of thermally activated and randomly vibrating atoms. The atomic diffusion in solids is complex and very slow in comparison to atomic diffusion in liquids and gases because the interatomic distance between the atoms is smaller in solids as compared to liquids and gases.