The Resistivity of Copper at 20ºC Is 1 $\times$ 10^-8 $\Omega$ · M and the Number of Electrons Per Cubic Centimeter

question 5

Multiple Choice

The resistivity of copper at 20ºC is 1.7 $\times$ 10^-8 $\Omega$ · m and the number of electrons per cubic centimeter is 8.47 $\times$ 10²².If you take the average speed of the electrons to be equal to their root-mean-square speed (at T = 300 K) of 1.17 $\times$ 10⁵ m/s,it follows that their mean free path, $\lambda$ ,must be

• A)1.23 nm
• B)1.86 nm
• C)2.35 nm
• D)2.89 nm
• E)None of these is correct.

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Definitions:

Prior Probabilities

The probabilities assigned to events before any new evidence is considered, often used in Bayesian analysis.

Expected Monetary Value

A calculated average of possible outcomes, where each outcome is weighted by its probability of occurrence and its monetary impact.

Optimal Act

The most efficient or effective action to achieve a desired outcome or goal.

Posterior Probabilities

The probabilities that are computed after taking into account known or observed evidence, often used in Bayesian statistics.