Question: 4 . A Zisman plot was constructed for two solid surfaces; the surfaces were identical, except one was smooth and one was rough. In all

4. A Zisman plot was constructed for two solid surfaces; the surfaces were identical, except one was smooth and one was rough. In all contact angle measurements used for this plot, the liquid was in a Wenzel wetting mode. The curve fits to the date are shown below; which curve is for the rough surface? (explain why you selected it)[15]
4 . A Zisman plot was constructed for two solid

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