UNIVERSE LL W/SAPLINGPLUS MULTI SEMESTER
11th Edition
ISBN: 9781319278670
Author: Freedman
Publisher: MAC HIGHER
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Chapter 21, Problem 35Q
To determine
Why the time interval between pulses from pulsar is large when the stars are close and the time interval is small when it is far away. Also, explain how it is related to gravitational slowing of time. Given that distance between two neutron stars in a binary system discovered by Hulse and Taylor varies from 1.1 to 4.8 times the radius of the sun.
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Suppose we represent an ordinary star as a uniform solid rigid sphere. The star’s initial radius is 644000 km (comparableto the size of our sun). After it collapses, forming a neutron star, its final radius is only 18.3 km! If the original starmakes one complete rotation about its axis once per month (every 30 days), find the neutron star’s period of rotationjust after the original star has collapsed.Tafter = (in s)
How close, r, to the center of a neutron star would a manned satellite be orbiting if it were at the location where the gravitational force from the star equaled the gravitational force of the Earth's surface?
RN = neutron star radius = 1 × 104 kmM N = neutron star mass = 3 × 1030 kgG = universal gravitational constant = 6.67 × 10-11 N m2 / kg2g⊕ = Earth gravitational acceleration = 9.807 m/s²
Assume that the laws of Newtonian mechanics and Newtonian gravity still hold for a neutron star, what approximately is the escape velocity at the surface of a 1.4 solar mass neutron with a radius of 10 km?
A. 2×108 m/s
B. 108 m/s
C. 1.5 ×108 m/s
D. 2.5 ×108 m/s
Chapter 21 Solutions
UNIVERSE LL W/SAPLINGPLUS MULTI SEMESTER
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