âºâº Definition: Second. A second of arc or arcsecond is a unit of angular measurement which comprises one-sixtieth of an arcminute, or 1/3600 of a degree of arc or 1/1296000 (approximately 7.710-7) of a circle.
The resistance of a liquid to flowing is its viscosity.   Viscosity is a property arising from friction between  neighboring particles in a fluid that are moving at dif â¦ ferent  velocities. In liquids, it could be considered the thickness.
Print PDF. The property that describes a liquidâs thickness or thinness is called viscosity; high viscosity (thick) liquids differ from low-viscosity (thin) ones. You will also use the particle theory to explain some behaviours and properties of fluidsâliquids and gases. A fluid is any substance that flows. The particle theory can explain why some substances flow while others do not.