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Get Full Access to University Physics - 13 Edition - Chapter 10 - Problem 41e
Get Full Access to University Physics - 13 Edition - Chapter 10 - Problem 41e

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# Under some circumstances, a star can collapse into an ISBN: 9780321675460 31

## Solution for problem 41E Chapter 10

University Physics | 13th Edition

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Problem 41E

Under some circumstances, a star can collapse into an extremely dense object made mostly of neutrons and called a ?neutron star?. The density of a neutron star is roughly 1014 times as great as that of ordinary solid matter. Suppose we represent the star as a uniform, solid, rigid sphere, both before and after the collapse. The star’s initial radius was 7.0 X 105 km (comparable to our sun); its final radius is 16 km. If the original star rotated once in 30 days, find the angular speed of the neutron star.

Step-by-Step Solution:

Solution 41E Step 1 of 1: For a uniform sphere and an axis through its center, 2 2 I = 5R The moment of inertia is proportional to the square of the radius, and so the angular velocity will be proportional to the inverse of the square of the radius, and the final angular velocity is R = R 2 1 1 2 2 We have to find the final angular velocity . 2 = ( ) R1 2 2 1 R2 5 km = ( 2 rad )(7×10 )2 30 days×86400 s/day 16 km 3 = 4.6 × 10 rad/s

Step 2 of 1

##### ISBN: 9780321675460

The answer to “Under some circumstances, a star can collapse into an extremely dense object made mostly of neutrons and called a ?neutron star?. The density of a neutron star is roughly 1014 times as great as that of ordinary solid matter. Suppose we represent the star as a uniform, solid, rigid sphere, both before and after the collapse. The star’s initial radius was 7.0 X 105 km (comparable to our sun); its final radius is 16 km. If the original star rotated once in 30 days, find the angular speed of the neutron star.” is broken down into a number of easy to follow steps, and 92 words. The full step-by-step solution to problem: 41E from chapter: 10 was answered by , our top Physics solution expert on 05/06/17, 06:07PM. University Physics was written by and is associated to the ISBN: 9780321675460. This textbook survival guide was created for the textbook: University Physics, edition: 13. This full solution covers the following key subjects: star, neutron, solid, radius, collapse. This expansive textbook survival guide covers 26 chapters, and 2929 solutions. Since the solution to 41E from 10 chapter was answered, more than 432 students have viewed the full step-by-step answer.

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