Question

Ratio of strain energy for solid and hollow shaft subjected to same torque if outside dia is ssame

Answer 1

Answer:

Concept:

For hollow shaft:

Strain energy (U) =

∴ Strain energy per unit volume (u) =

Where, G = Shear modulus of rigidity, D = external diameter, d = hollow diameter and τ = Shear stress

Calculation:

Here: τ = fs

∴ d/D = 1/4

Explanation:

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Answer 2

1e=1/1.6*10^-19coloumb then the answer

Explanation:

2/1.6*10^-19c