1.13 The resistivity of a water-bearing sand was found to be 0.4 n-m. If the formation water resistivity is 0.02 N.m, give your best estimate of the formation porosity. What is the statisti- cally possible range of porosity in this sand?

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A: A→ = 3 i^ - 3 j^B→ = i^ -4 j^ C→ =- 2 i^ + 5 j^ (A)  D→=  A→ + B→ + C→D→ = (3 + 1 - 2 ) i^ + (- 3 -…

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A: Here is the Answer and Explanation

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Q: solution hard to understand. please hand write and scan.

A: The expectation value for any operator A is given by  Where ψ(x) is the wavefunction of the system.

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