UNIVERSE LL W/SAPLINGPLUS MULTI SEMESTER
UNIVERSE LL W/SAPLINGPLUS MULTI SEMESTER
11th Edition
ISBN: 9781319278670
Author: Freedman
Publisher: MAC HIGHER
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Chapter 20, Problem 7Q

(a)

To determine

The loss of mass due to stellar winds from an AGB star in metric tons per second, if the loss rate of the mass is 104M per year.

(b)

To determine

The time required to eject the mass from AGB star equivalent to the mass of the earth if the loss rate of the mass from AGB star is 104M per year.

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The star HD 69830's mass is 1.7 ✕ 1030 kg, its radius is 6.3 ✕ 105 km, and it has a rotational period of approximately 35 days. If HD 69830 should collapse into a white dwarf of radius 7.8 ✕ 103 km, what would its period (in s) be if no mass were ejected and a sphere of uniform density can model HD 69830 both before and after?
A star with mass m, period Ti = 30 days, and radius ri = 1E4 km collapses into a neutron star (Links to an external site.) with a radius of rf = 3 km. Our goal will be to determine the period Tf of the neutron star. Useful formulae: Li=Lf; L=Iω; ω=2πf=2π/T; Isphere=2/5mr^2.
If a neutron star has a radius of 15 km and rotates 822 times a second, what is the speed of the surface at the neutron star's equator as a fraction of the speed of light?

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UNIVERSE LL W/SAPLINGPLUS MULTI SEMESTER

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