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# Neutron Star Glitches. Occasionally, a rotating neutron ISBN: 9780321675460 31

## Solution for problem 94P Chapter 10

University Physics | 13th Edition

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Problem 94P

Neutron Star Glitches.? Occasionally, a rotating neutron star (see Exercise 10.41) undergoes a sudden and unexpected speedup called a glitch. One explanation is that a glitch occurs when the crust of the neutron star settles slightly, decreasing the moment of inertia about the rotation axis. A neutron star with angular speed ?0 = 70.4 rad/s underwent such a glitch in October 1975 that increased its angular speed to ? = ?0 + ??, where ??/?0 = 2.01 X 10-6. If the radius of the neutron star before the glitch was 11 km, by how much did its radius decrease in the starquake? Assume that the neutron star is a uniform sphere.

Step-by-Step Solution:

Solution 94P Step 1: Given data: Neutron star with angular speed w = 70.4 rad/s 0 6 Increased angular speed w /w0= 0.01 × 10 Radius of neutron star before glitch R 1 11 Km Radius decrease after starquake R = R 2 Step 2: 2 Consider angular momentum L is conserved,and L = Iw = cMR w.c is some factor appropriate to the sphere so 2 2 cMR w1= c1R w 2 2 R 2= R (w /w ) 2 1 1 2 R 2 R (w1/w 1 2 R 2 R 1 w 1w 2 R = R w /w + w ) 2 1 0 0 0 R 2 R 1 1 w 0w 0 R 2 R (11 w /2w0) 0

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##### ISBN: 9780321675460

The answer to “Neutron Star Glitches.? Occasionally, a rotating neutron star (see Exercise 10.41) undergoes a sudden and unexpected speedup called a glitch. One explanation is that a glitch occurs when the crust of the neutron star settles slightly, decreasing the moment of inertia about the rotation axis. A neutron star with angular speed ?0 = 70.4 rad/s underwent such a glitch in October 1975 that increased its angular speed to ? = ?0 + ??, where ??/?0 = 2.01 X 10-6. If the radius of the neutron star before the glitch was 11 km, by how much did its radius decrease in the starquake? Assume that the neutron star is a uniform sphere.” is broken down into a number of easy to follow steps, and 111 words. Since the solution to 94P from 10 chapter was answered, more than 412 students have viewed the full step-by-step answer. University Physics was written by and is associated to the ISBN: 9780321675460. The full step-by-step solution to problem: 94P from chapter: 10 was answered by , our top Physics solution expert on 05/06/17, 06:07PM. This full solution covers the following key subjects: neutron, star, glitch, radius, speed. This expansive textbook survival guide covers 26 chapters, and 2929 solutions. This textbook survival guide was created for the textbook: University Physics, edition: 13.

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