Question

(a) How can we distinguish between a solid and a fluid? (6 pts) (b) How can the strength of capillary effect be quantified? (4 pts)

Answer 1

Solid Example: Ice Has definite shape and size Doesn't flow under the action of a force Fluid(liquid/gas) Example: Water, Steam Attains the shape of the container Flows under the action of a force. Hence called fluids. Lower densities than solid Disorderly arrangement of atoms Atoms moves randomly in liquid and gas. Velocity is more in gases than liquids Highest density among the 3 states of matter Atoms are arranged in orderly manner Atoms are in static in their position and don't move. Does not deform under force normally Deforms under force Liquid Gas

Strength of capillary effect is quantified by Wetting/Contact angle (0) Wetting (Water) Not-wetting (Mercury)