A Surface Is Examined Using a Scanning Tunneling Microscope (STM)

question 33

Multiple Choice

A surface is examined using a scanning tunneling microscope (STM) .For the range of the working gap,L,between the tip and the sample surface,assume that the electron wave function for the atoms under investigation falls off exponentially as .The tunneling current through the STM tip is proportional to the tunneling probability.In this situation,the ratio of the current when the STM tip is 0.425 nm above a surface feature to the current when the tip is 0.465 nm above the surface is

• A)1.49.
• B)2.45.
• C)2.98.
• D)3.18.
• E)3.32.

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Definitions:

Output

Output usually refers to the total amount of goods and services produced by a company, industry, or economy within a specific period.

Total Revenue

The full amount of income generated by the sale of goods or services by a company before any costs or expenses are subtracted.

ATC

Average Total Cost, which is calculated by dividing the total cost of production by the quantity of output produced. It includes both fixed and variable costs.

MC

Marginal Cost, which refers to the increase or decrease in the total cost of production when the output is adjusted by one additional unit.