Why won't let me make a account or log in? It's always telling me that it can't take my registration at this time or it won't work when I've filled everything out

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.

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