Physics for Scientists and Engineers with Modern, Revised Hybrid (with Enhanced WebAssign Printed Access Card for Physics, Multi-Term Courses)
Physics for Scientists and Engineers with Modern, Revised Hybrid (with Enhanced WebAssign Printed Access Card for Physics, Multi-Term Courses)
9th Edition
ISBN: 9781305266292
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
Question
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Chapter 41, Problem 32P

(a)

To determine

The transmission coefficient.

(b)

To determine

The width of the barrier to increase the transmission coefficient by one in one million.

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An electron having total energy E = 4.50 eV approaches a rectangular energy barrier with U = 5.00 eV and L = 950 pm as shown in Figure P40.21. Classically, the electron cannot pass through the barrier because E < U. Quantum-mechanically, however, the probability of tunneling is not zero.(b) To what value would the width L of the potential barrier have to be increased for the chance of an incident 4.50-eV electron tunneling through the barrierto be one in one million?
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An alpha particle is a helium nucleus consisting of two protons and two neutrons. It is moving with a speed of 1.90 × 103 m/s. What is the momentum of the alpha particle? (Give answer in kg x m/s) а. b. If there is a 25% uncertainty in the momentum of this alpha particle, what is the minimum uncertainty in the position of the alpha particle? (Give your answer in meters)

Chapter 41 Solutions

Physics for Scientists and Engineers with Modern, Revised Hybrid (with Enhanced WebAssign Printed Access Card for Physics, Multi-Term Courses)

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