EBK PHYSICS FOR SCIENTISTS & ENGINEERS
EBK PHYSICS FOR SCIENTISTS & ENGINEERS
5th Edition
ISBN: 9780134296074
Author: GIANCOLI
Publisher: VST
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Chapter 43, Problem 7P
To determine

The particle among 25MeV alpha particle and 25MeV proton that is better for resolving the details of the nucleus.

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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
(II) A radioactive element undergoes an alpha decay with a lifetime of 12 us. If alpha particles are emitted with 5.5-MeV kinetic energy, find the percent uncertainty AE/E in the particle energy.
3. The radius of a hydrogen nucleus is believed to be about 1.2 fm. (a) If an electron rotates around the nucleus at that radius, what would be its speed according to the planetary model? (b) What would be the total mechanical energy? (c) Are these values reasonable?
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