A steel has a radius of 10mm and a length of 1.0m. A 100kN force stretches it along its length. Calculate stress and strain on the rod. Young's modulus of steel is `2.0 xx 10^11 Nm^-2`.

A steel wire 4 m in length and 2.4*10^(-7)m^2 in cross - section is stretched by a force of 36N . Calculate the stress and strain .

A copper wire is stretched so as to increase its length by 0.2% . Calculate the percentage change in the resistance of the wire.

A steel wire of diammeter 2 mm is pulled to increase its length by 1% what is the restoring force developed in it if young's modulus for steel 2 *10^12 dynes/ cm ^2 .

A uniform steel wire of density 7.8 g/cc weighs 8 g and is 125 cm long . It lengthens by 0.6 mm whwn stretched by a force of 8 kg-wt . Calculate young's modulus for steel .

A steel wire of length 4.7 m and cross-sectional area 3.0 xx 10^- 5 m^2 stretches by the same amount as a copper wire of length 3.5 m and cross-sectional area of 4.0 xx 10^-5 m^2 under a given load. What is the ratio of the Young’s modulus of steel to that of copper?

Calculate the amount of work done for a wire which area of cross section 10^-6m^2 and length 1.5m to increase the length 4 xx 10^-3 m. Young's modules of elasticity 2 xx 10^(11N//m^2) .

A disc of mass 5 kg radius 0.5 m rolls on the ground at the rate of 10 ms^(-1) . Calculate its KE.

Nickel has fcc unit cell. The edge length of the unit cell is 0.352nm. Calculate the atomic radius of nickel. Also find its density.