A metallic cube of side 100 cm is subjected to a uniform force acting normal to the whole surface of the cube. The pressure is 10⁶ pascal. If the volume changes by 1.5\(\times\)10^-5 m³, calculate the bulk modulus of the material.

A wire of length 2 m with the area of crosssection 10^-6m² is used to suspend a load of 980 N. Calculate
i) the stress developed in the wire
ii) the strain and
iii) the energy stored. Given: Y = 12 \(\times\) 10¹⁰N m⁻².

State Hooke’s law of elasticity. 

Explain elasticity using intermolecular forces.

A spring balance shows wrong readings after using for a long time. Why?