Table of Contents
Can solids have a viscosity?
A True solid is not viscous. Generally viscosity refers to a state where materials can flow. So we true solid are the substances which cannot flow so we may conclude that they are not viscous.
Does a solid have infinite viscosity?
The viscosity of a substance is simply the proportionality constant required to equate strain rate with stress. An ideal solid is one that has infinite viscosity, and thus will never deform regardless of the stress applied. An ideal fluid has no viscosity and thus offers no resistance to strain.
Is viscosity only for liquids?
Introduction. Viscosity can be not only a fluid’s resistance to flow but also a gas’ resistance to flow, change shape or movement. The opposite of viscosity is fluidity which measures the ease of flow while liquids such as motor oil or honey which are “sluggish” and high in viscosity are known as viscous.
Why are solids incompressible?
Answer : Solids are characterized by short intermolecular distance and strong intermolecular forces. Their constituent particles which can be atoms, molecules or ions have fixed positions unlike liquids or gases and can only oscillate about their mean positions. Hence, solids are incompressible.
Why do solids have definite shape and volume?
Solids have a definite volume and shape because particles in a solid vibrate around fixed locations. Strong attractions between the particles in a solid restrict their motion, keeping them in place.
Why does water have a low viscosity?
Water has a narrow viscosity spectrum (as a function of temperature) because it has a narrow stress relaxation time spectrum. It has a narrow stress relaxation time spectrum because it is a relatively simple, small molecule.
Why solids are hard and incompressible?
Solids, in contrast, are relatively dense, rigid, and incompressible because their intermolecular forces are so strong that the molecules are essentially locked in place. Liquids are relatively dense and incompressible, like solids, but they flow readily to adapt to the shape of their containers, like gases.
Why do solids have a definite volume?
(a) Solids have definite shape and definite volume because the molecules in solid are closely packed and in fixed positions. The molecules can vibrate but do not move around which keeps the shape and volume definite.
What causes a viscosity increase of liquids?
Viscosity generally increases as the temperature decreases. The viscosity of a liquid is related to the ease with which the molecules can move with respect to one another. Thus the viscosity of a liquid depends on the: strength of attractive forces between molecules, which depend on their composition, size, and shape.