PHYSICS F./SCI... W/MOD V.II W/KIT
PHYSICS F./SCI... W/MOD V.II W/KIT
4th Edition
ISBN: 9780134819884
Author: GIANCOLI
Publisher: PEARSON
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Chapter 38, Problem 12P
To determine

The proof that if an electron were present in the nucleus, the kinetic energy would be hundreds of MeV.

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Q#1 (a)(i)A thermal neutron has a speed v at temperature T= 300 K and kinetic energy m-: 3 KT Calculate its deBroglie wavelength. State whether a beam of these neutrons could be diffracted by a crystal, and why? (ii) Explain in detail two Heisenberg uncertainty principles. Apply Uncertainty principle to estimate the kinetic energy (in MeV) of a nucleon bound within a nucleus of radius 10 15 m. (b) A metal surface is illuminated by 8.5 x 10'* Hz light emits electrons whose maximum energy is 1.97 eV. The same surface is illuminated by 12 x 104H2 light emits electrons whose maximum energy is 0.53 eV. Find the Planck's constant and work function of the surface. idth nf one dimensional hox in which a proton has an energy of 400,000 eV in its first excited
Make the (incorrect) assumption that the nucleus is composed of electrons and that the protons are out- side. (a) If the size of an atom were about 10-¹⁰ m, what would be the speed of a proton? (b) What would be the total mechanical energy? (c) What is wrong with this model?
By using the principle of accuracy, he proved the impossibility of the electron being inside the nucleus, given that the radius of the nucleus is 1 x 10-14m.

Chapter 38 Solutions

PHYSICS F./SCI... W/MOD V.II W/KIT

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