Question

Dear Students your assignment for today is:
Comment upon the following:
rigidity, compressibility,
fluidity, filling a gas
container, shape, kinetic
energy and density.

Answer 1

it's answer is    (i) Rigidity: It is the propensity of a substance to continue to remain in its shape when treated

with an external force.

(ii) Compressibility: It is the attribute of the particles to contract its intermolecular space when

exposed to an external force thereby escalating its density.

(iii) Fluidity: It is the ability of a substance to flow or move about freely.

(iv) Filling the gas container: The particles in a container take its shape as they randomly vibrate in

all possible directions.

(v) Shape: It is the definite structure of an object within an external boundary

(vi) Kinetic energy: Motion allows particles to possess energy which is referred to as kinetic

energy. The increasing order of kinetic energy possessed by various states of matter are:

Solids < Liquids < Gases

Mathematically, it can be expressed as K.E =12mv2, where ‘m’ is the mass and ‘v’ is the velocity

of the particle.

(vii) Density: It is the mass of a unit volume of a substance. It is expressed as:

   d = M/V, where ‘d’ is the density, ‘M’ is the mass and ‘V’ is the volume of the substance

Answer 2

Explanation:

1. Rigidity = It is the tendency to maintain the shape whenever outward force is applied.
2. Compressibility = It is the tendency to decrease the volume of the matter by applying force and not changing the mass.
3. Fluidity = It is the tendency of matter to flow.
4. Filling a gas container = A gas container can be filled with a large amount of gas when an external pressure is applied on a gas while filling. In the gas container, the gas particles are compressed into a small volume.
5. Shape = Solids have definite shapes and definite boundaries.
6. Kinetic energy = It is the energy of motion, observable as the movement of an object, particle, or set of particles.
7. Density = It is defined as the mass per unit volume.