Definition
Elasticity
Elasticity is the ability of an object or material to resume its normal shape after being stretched or compressed.
Example: A rubber regains its shape after long stretch because of its elastic property.
Example: A rubber regains its shape after long stretch because of its elastic property.
Definition
Plasticity
Plasticity is the propensity of a material to undergo permanent deformation under load.
Example: Wood, Plastic Bottle etc.
Example: Wood, Plastic Bottle etc.
Definition
Elastic after effect
When a elastic body is stretched and applied deforming force is removed then the body is expected to return to its original configuration instantaneously. But sometimes some materials take some time to return to its original configuration. This temporary delay in achieving its original configuration is termed as elastic after effect.
This elastic after effect is very short for quartz fiber. But elastic after effect is more for glass. Therefore quartz fiber is used in galvanometer coil
This elastic after effect is very short for quartz fiber. But elastic after effect is more for glass. Therefore quartz fiber is used in galvanometer coil
Example
Effect of temperature and impurity on Elasticity
Effect of temperature on Elasticity:- As the temperature of substance increases, its elasticity decreases.
Effect of impurity on elasticity: If impurity is added in any substance then elasticity of that substance is affected. It is dependent upon the type of impurity added into that substance. If the added impurity is more elastic than the substance then its elasticity is increased. If the added impurity is less elastic than the substance, then its elasticity is decreased
Definition
Adiabatic Elasticity
Due to high compressibility, gases possess volume elasticity. However, the magnitude of the volume elasticity depends on conditions under which it is compressed.
If the gas is compressed such that the temperature is not allowed to change, i.e. under isothermal conditions than the corresponding volume elasticity is known as isothermal elasticity represented as K. If the gas is compressed such that no heat is allowed to enter or leave the system, i.e. under adiabatic conditions than the corresponding elasticity is known as adiabatic elasticity and is represented as K
If the gas is compressed such that the temperature is not allowed to change, i.e. under isothermal conditions than the corresponding volume elasticity is known as isothermal elasticity represented as K. If the gas is compressed such that no heat is allowed to enter or leave the system, i.e. under adiabatic conditions than the corresponding elasticity is known as adiabatic elasticity and is represented as K
Definition
Co-efficient of elasticity
"Modulus of elasticity or co-efficient of elasticity or Elastic constant is defined as the ratio of stress to strain.
The SI unit of elastic constant is . It is same as that of stress.
The SI unit of elastic constant is . It is same as that of stress.
Example
Examples of elastomer and thermoplastic
Rubbers (both natural and synthetic) are widely used for the manufacture of tires, tubes, hoses, belts, matting, gloves, toy balloons, rubber bands, pencil erasers, and adhesives.
Thermoplastic elastomers are used in manufacturing processes, such as by injection molding. Thermoplastic polyurethanes are used for various applications, including the production of foam seating, seals, gaskets, etc.
Thermoplastic elastomers are used in manufacturing processes, such as by injection molding. Thermoplastic polyurethanes are used for various applications, including the production of foam seating, seals, gaskets, etc.
Definition
Elastomers
An elastomer is a polymer with the property of elasticity. In other words, it is a polymer that deforms under stress and returns to its original shape when the stress is removed
Elastomers, which melt when heated, are classified as thermoplastic
Elastomers, which melt when heated, are classified as thermoplastic
Definition
Elastomers
An elastomer is a polymer with viscoelasticity (having both viscosity and elasticity) and very weak inter-molecular forces, generally having low Young's modulus and high failure strain compared with other materials. The term, which is derived from elastic polymer, is often used interchangeably with the term rubber.
Example:All sorts of saturated and unsaturated rubbers and polysulfide rubbers
Example:All sorts of saturated and unsaturated rubbers and polysulfide rubbers
Definition
Solids and it's Types
Solid is one of the four fundamental states of matter, others are liquid, gas and plasma. Some of the important properties of solids as comapred to other states of matter is :
1. solid is rigid and all the atoms are tightly bonded with each other.
2. Unlike liquid solid cannot flow and by applying small force we cant change shape of solids by small force.
Some major classification of solids are:
Crystalline Solids
Amorphous Solids
We will discuss about them with their classification and example.
1. solid is rigid and all the atoms are tightly bonded with each other.
2. Unlike liquid solid cannot flow and by applying small force we cant change shape of solids by small force.
Some major classification of solids are:
Crystalline Solids
Amorphous Solids
We will discuss about them with their classification and example.
Definition
Crystalline Solids
Crystalline solids are those in which the atoms, ions, or molecules that make up the solid exist in a regular, well-defined arrangement. The smallest repeating pattern of crystalline solids is known as the unit cell, and unit cells are like bricks in a wallthey are all identical and repeating.
There are 4 types of Crystalline Solids:
1. Ionic Solids
2. Molecular Solids
3. Atomic Solids
4. Metallic Solids
There are 4 types of Crystalline Solids:
1. Ionic Solids
2. Molecular Solids
3. Atomic Solids
4. Metallic Solids
Definition
Molecular Solids
Molecular solids - Made up of atoms or molecules held together by London dispersion forces, dipole-dipole forces, or hydrogen bonds.
Characterized by low melting points and flexibility and are poor conductors.
An example of a molecular solid is sucrose
Characterized by low melting points and flexibility and are poor conductors.
An example of a molecular solid is sucrose
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