Q.3 Define following
terms:
Density
compressibility
O
Kinetic energy
Rigiality
Eludity.
Answers
Answer:
(a) Rigidity
It is the strongest force of attraction between particles and this property makes the solid rigid. Rigidity gives the perfect shape to solids, the particles in the solid are tightly packed. Solid does not get deformed easily by applying extra pressure.
(b) Compressibility
Compressibility is mostly observed in gases. A lot of space between particles, a gas can be compressed to a higher extent. Solids have the least compressibility and liquids have little compressibility because of the least space between their particles.
(c) Fluidity
The ability to flow is called fluidity. The less force of attraction and more space between particles makes the liquid and gas flow easily. Fluidity is not observed in solids.
(d) Kinetic energy
The kinetic energy of particles of a solid is the minimum. They only vibrate at their fixed position. The kinetic energy of particles of liquid is more than compared to solid. But they can slide above one another. The kinetic energy of particles in a gas is maximum.
(e) Density
Density is defined as the mass per unit volume of a substance. The density of solid is highest, then comes liquid, and last comes the gases.