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If a silver specimen is annealed for a long time under conditions favoring the development of...

If a silver specimen is annealed for a long time under conditions favoring the development of grooves along the lines where internal grain boundaries intersect the outer surface of the sample, a groove angle of 139.5° occurs. If the grain boundary energy for silver is 0.790 J/m2, what is the energy of the solid-vapor surface?

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