The evolution of a star depends on its size. If a star is sufficiently large, the gravityforces holding it together may be large enough to collapse it into a very dense objectcomposed mostly of neutrons. The density of such a neutron star is about 1014 timesthat of the Earth. Suppose that a star initially had a radius of 7 x 108 km, and itrotated once every 26 days. What would be the period of rotation if the star collapsedto a radius of 15 km? (1.19 x 10-14 days)

In the given, we will use the the conservation of angular momentum which states that the inital…

Answered: The evolution of a star depends on its…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter39: Relativity

Section: Chapter Questions

Problem 64PQ

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Two double stars, one having mass 1.0 Msun and the other 3.0 Msun, rotate about their common center of mass. Their separation is 6 light years. What is their period of revolution?
The evolution of a star depends on its size. If a star is sufficiently large, the gravity forcesholding it together may be large enough to collapse it into a very dense object composed mostlyof neutrons. The density of such a neutron star is about 1014 times that of the earth. Suppose thata star initially had a radius about that of our sun, 7 × 108 km, and that it rotated once every 26 days,as our sun does. What would be the period of rotation (the time for 1 rev) if the star collapsed to aradius of 15 km?
C6M.9 Astar with mass M and radius R collides with another star of massM and radius R, and coalesce to form a new star at rest whose radius is R. Assume that initially the colliding stars had angular velocities with opposite direc- tions but the same magnitude | What is the magnitude and direction of the final star's angular velocity? (Express the magnitude as a fraction of )
The rate at which a nebular cloud rotates increases as the cloud collapses to form systems of stars and planets. Consider a small segment of a nebular cloud with a mass m of 1.9 x 102' kg, tangential velocity vinitial equal to 6.8 km s located at an orbital distance rinitial = 2.5 x 104 km. After the cloud collapses, the same small segment is located at an orbital distance rfinal = 3.2 x 10³ km. Calculate the change of the rotational velocity, Aw, for the cloud segment, assuming perfectly circular orbits. Perform your work and report your solution using two significant figures. Δω rad s-1
The Sun’s mass is 2.0 × 1030 kg, its radius is 7.0 × 105 km, and it has a rotational period of approximately 28 days. If the Sun should collapse into a white dwarf of radius 3.5 × 103 km, what would its period be if no mass were ejected and a sphere of uniform density can model the Sun both before and after?
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Answer the question in full details, thank you very much, Answer on the correct significant figures: A star of mass 1.87 x 10^31 kg and diameter 9.44 x 10^9 m rotates with a period of 26.0 days. Suddenly, the star changes size and rotates with a new period of 19.0 days. The mass of the star is conserved. Assuming a uniform (but different) density both before and after the size change, by what fraction doesits [diameter change? In other words, what is (new diameter)/(old diameter)?
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