The no-slip condition is: a. Valid only for liquids
b. It only applies to compressible gases
c. An experimental observation that the velocity of a fluid in contact with a solid surface is equal to the velocity of the surface.
d. Indicates that two solids in contact will not slip if the joining force is large.
e. Useful only for very low density geses.

The correct answer is option (c) An experimental observation that the velocity of a fluid in contact with a solid surface is equal to the velocity of the surface.

Explanation

Solution:

When a fluid is in proximity to the boundary the solid and the velocities are the same or uniform for the fluid and the surface, no slip condition does not exist.

However, because the no-slip meets the expectations for gas and liquids, this condition no way connected in this case of two solid in proximity.

hence, the other options are wrong here.

answer:

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