viscosity Flashcards
1
Q
what are cohesive forces
A
intermolecular forces
2
Q
what are adhesive forces
A
interaction between solid and the molecules of a fluid
3
Q
what is kinematic velocity a ratio of?
A
absolute viscosity / fluid density
4
Q
define surface tension
A
the tension of the surface of a liquid caused by the attraction of the particles in the surface layer by the bulk of the liquid, which tends to minimize surface area.
5
Q
what does it mean for surface tension if bubbles form on the surface
A
surface tension is low
6
Q
describe viscosity in gases
A
cohesive forces are small and ther will be a continuous interchange of molecules between adjacent layers travelling at different velocities.
7
Q
describe viscosity in liquids
A
cohesive forces are considerable. temperature reduces cohesive forces.
8
Q
A
