Physics for Scientists and Engineers with Modern Physics
Physics for Scientists and Engineers with Modern Physics
4th Edition
ISBN: 9780131495081
Author: Douglas C. Giancoli
Publisher: Addison-Wesley
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Chapter 38, Problem 47GP
To determine

The lowest possible energy of a neutron contained in a typical nucleus.

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79.  a) Assume an electron in the ground state of the hydrogen atom moves at an average speed of 5.00×106 m/s. If the speed is known to an uncertainty of 1 percent, what is the minimum uncertainty in its position?The radius of the hydrogen atom in the ground state is 5.29×10−11 m. The mass of an electron is 9.1094×10−31 kg. (b) A 0.16−kg baseball thrown at 100 mph has a momentum of 7.2 kg·m/s. If the uncertainty in measuring the mass is 1.0×10^−7 of the mass, calculate the uncertainty in the baseball's position.
Problem 2: Line XY was measured by four parties a, b, c, d. Each party has two measurements as follows: Trial B 91.21 91.27 D 91.20 91.18 91.26 A 1 2 91.25 91.19 91.22 Find the precision of each party and find out which has the highest precision. b. What is the most probable length of XY? a.
The total probability of finding an electron in the hydrogen atom is related to the integral ∫ r2 e-2r/ao dr Where r is the distance of the electron from the nucleus and ao is the Bohr radius. Evaluate thisintegral.

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Physics for Scientists and Engineers with Modern Physics

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