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by jlangenauer
5852 days ago
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No, pressure is not pressure. There are two ways a fluid or gas can exert a force on another body: through normal pressure ("normal" here meaning the local normal perpendicular to the surface of the body at that point), and through shear forces, which are dependent (mainly) on the viscosity of the liquid, but also local fluid effects such as boundary layers etc can come into play. |
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