Question

the ground state energy of hydrogen atom is -13.6 electron volt what are the Kinetic and potential energies of electron in this state??​

Answer 1

Young's modulus for steel wire:

Y1 = (F1/A1) x (L1/ΔL1) 

= F1 x 4.7 / 3.0 x 10⁻⁵ x ΔL ----(1) 

Young's modulus for copper 

Y2 = (F2/A2) x (L2 /ΔL2) 

     = F x 3.5 / 4 x 10^-5 x ΔL----(2) 

By 1 and 2 

Y1 / Y2 = 4.7 x 4.0 x 10^-5 / 3.0 x 10^-5 x 3.5 = 1.79 : 1 

Young's modulus for steel wire:

Y1 = (F1/A1) x (L1/ΔL1) 

= F1 x 4.7 / 3.0 x 10⁻⁵ x ΔL ----(1) 

Young's modulus for copper:

Y2 = (F2/A2) x (L2 /ΔL2) 

     = F x 3.5 / 4 x 10^-5 x ΔL----(2) 

By 1 and 2,

Y1 / Y2 = 4.7 x 4.0 x 10^-5 / 3.0 x 10^-5 x 3.5 = 1.79 : 1 

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