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Get Full Access to University Physics, Volume 3 - 17 Edition - Chapter 7 - Problem 90
Get Full Access to University Physics, Volume 3 - 17 Edition - Chapter 7 - Problem 90

× ISBN: 9781938168185 2032

## Solution for problem 90 Chapter 7

University Physics, Volume 3 | 17th Edition

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Problem 90

In STM, an elevation of the tip above the surface being scanned can be determined with a great precision, because the tunneling-electron current between surface atoms and the atoms of the tip is extremely sensitive to the variation of the separation gap between them from point to point along the surface. Assuming that the tunneling-electron current is in direct proportion to the tunneling probability and that the tunneling probability is to a good approximation expressed by the exponential function $$e^{-2 \beta L} \text { with } \beta=10.0 / \mathrm{nm}$$,  determine the ratio of the tunneling current when the tip is 0.500 nm above the surface to the current when the tip is 0.515 nm above the surface.

Text Transcription:

e^-2 beta L with beta=10.0/nm

Step-by-Step Solution:
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EXAM 2 NOTES 9/21/16 OUTLINE  The nervous system as a machine  The 3­box model o DATA – in – sensory  From the periphery o Analysis – integration  CNS (brain and spinal cord) o DATA out – motor  Biological definitions: o Peripheral nervous system:  Sensory in  Afferents o “Toward” the CNS  Motor out  Efferents o “Away” from the CNS o Central nervous system  Brain and spinal cord  Sensory transduction: o Change in form of energy  Conversion to ion movements across membranes o Types of energy:  Electromagnetic  Mechanical  Chemical  The neuron doctrine o The neuron as the fundamental structural and functional unit of the nervous system 3­Box Model  Data in  Analysis  Data out  Take this simple 3 step paradigm and apply it to the nervous system o In this case, the data coming in is sensory information  Take the sensory info and integrate it o Motor out  As we sit here and currently don’t worry about things like lions, we still have sensory info coming in o We make decisions to sit still, stay put, or leave o The idea of integration

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##### ISBN: 9781938168185

This full solution covers the following key subjects: . This expansive textbook survival guide covers 11 chapters, and 1216 solutions. University Physics, Volume 3 was written by Aimee Notetaker and is associated to the ISBN: 9781938168185. This textbook survival guide was created for the textbook: University Physics, Volume 3 , edition: 17. Since the solution to 90 from 7 chapter was answered, more than 205 students have viewed the full step-by-step answer. The answer to “?In STM, an elevation of the tip above the surface being scanned can be determined with a great precision, because the tunneling-electron current between surface atoms and the atoms of the tip is extremely sensitive to the variation of the separation gap between them from point to point along the surface. Assuming that the tunneling-electron current is in direct proportion to the tunneling probability and that the tunneling probability is to a good approximation expressed by the exponential function $$e^{-2 \beta L} \text { with } \beta=10.0 / \mathrm{nm}$$, determine the ratio of the tunneling current when the tip is 0.500 nm above the surface to the current when the tip is 0.515 nm above the surface.Text Transcription:e^-2 beta L with beta=10.0/nm” is broken down into a number of easy to follow steps, and 122 words. The full step-by-step solution to problem: 90 from chapter: 7 was answered by Aimee Notetaker, our top Physics solution expert on 03/18/22, 10:28AM.

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