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    Mechanical Properties of Solids
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    Which force is more stronger-interatomic or intermolecular force?
    Inter-atomic force is stronger than the intermolecular force.
    Interatomic force is caused as a result of sharing and transfer of electrons between the atoms. And, intermolecular forces arises because of partial charges present on different atoms within a molecule. Hence, this makes interatomic force stronger than intermolecular force.   
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    What is the nature of inter-atomic or inter-molecular forces?

    Inter-atomic or inter-molecular forces are electrostatic in nature. 

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     Define rigid body.

    A rigid body generally means a hard solid object having a definite shape and size. That is, the constituent particles do not change the relative position when deforming force is applied on a rigid body.
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    What is the force of cohesion?
    Cohesive attraction or cohesive force is the force of attraction between same types of molecules sticking together. 
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    What is the force of adhesion?

    Adhesive force is the attractive force between two unlike molecules. They are caused by forces acting between two substances like electrostatic force (attraction due to opposing charges), mechanical force etc. 

    E.g., Force of attraction between gum and paper.

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