If a liquid wets a surface,is its angle of contact acute or obtuse?

$A$ glass plate is partly dipped vertically in mercury and the angle of contact is measured. If the plate is inclined,then the angle of contact will

Define the angle of contact.

If a capillary tube is dipped into a liquid and the levels of the liquid inside and outside are the same,then the angle of contact is ...... $^o$.

$A$ capillary tube is dipped vertically in a liquid. If the liquid surface is hemispherical,then the angle of contact $\theta$ is

The parts of motor cars are polished by chromium because the angle of contact between water and chromium is