A steel wire of length 4.7 m and cross-sectional area 3.0 × 10-5 m2 stretches by the same amount as a copper wire of length 3.5 m and cross-sectional area of 4.0 × 10–5 m2 under a given load. What is the ratio of the Young’s modulus of steel to that of copper?
Length of steel wire, Ls = 4.7m
Length of copper wire, Lc=3.5m
Area of cross-section of steel wire, As=3.0 x 10-5 m2
Area of copper wire, Ac = 4.0 x 10-5 m2
To find = the ratio of Young's modulus of steel to that of copper?
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.
Inter-atomic or inter-molecular forces are electrostatic in nature.