Astronomers observe a neutron star of radius 7.10 km and determine that it’s rotating at 21.9...
Astronomers observe a neutron star of radius 7.10 km and determine that it’s rotating at 21.9 rpm. If the stellar core that collapsed to form the neutron star was originally rotating with a period of 49.3 days, what was its radius?
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Astronomers observe a neutron star of radius 7.10 km and
determine that it’s rotating at 21.9...
Formation of a Neutron Star A star rotates with a period of 29 days about an axis through its cen...
Please solve for Tf and how
fast the neuron star rotate in rotations per seconds.
Formation of a Neutron Star A star rotates with a period of 29 days about an axis through its center. The period is the time interval required for a point on the star's equator to make one complete revolution around the axis of rotation. After the star undergoes a supernova explosion, the stellar core, which had a radlus of 1.5 x 104 km, collapses into...
1, A star with a mass of 1.25 × 1031 kg and a radius of 3.45...
1, A star with a mass of 1.25 × 1031 kg and a radius of 3.45 × 105 km is initially rotating on its axis with a period of 24.0 days. The star collapses and becomes a neutron star with a radius of 12.5 km, retaining all of its original mass. Assume the star is a uniform solid sphere before and after the collapse, with a moment of inertia given by (2/5)MR2. What is the period of rotation after collapse?...
(Carroll and Ostlie, 16.16) (a) Determine the minimum rotation period for a 1.4 M. neutron star...
(Carroll and Ostlie, 16.16) (a) Determine the minimum rotation period for a 1.4 M. neutron star (the fastest it can spin without the centrifugal force being stronger than the gravitational force at the surface). Assume that the radius of the star is 10 km. (b) Use Newton's expression for the difference between Polar and Equatorial radii of a rotating object to estimate the flattening of a rotating neutron star (of course, it's a little harder in GR). The expression is...
If a neutron star has a radius of 15 km and rotates 1,382 times a second,...
If a neutron star has a radius of 15 km and rotates 1,382 times a second, what is the speed at which a point on the surface at the neutron star's equator is moving? Express your answer as a fraction of the speed of light. (Note: The speed of light is 3 ✕ 105 km/s.)
A star is rotating with a period of 34.4 days. At the end of its lifetime...
A star is rotating with a period of 34.4 days. At the end of its lifetime it sheds its outermost layers, leaving a core of radius 5.36×108m. The core then collapses into a white dwarf of radius 4.81×106m.Assuming that no torques have acted on the core, find its rotation period after the collapse.
A neutron star has a radius of 10 km and a mass of 1.4 Solar masses,...
A neutron star has a radius of 10 km and a mass of 1.4 Solar masses, what is its density and how does this compare to the nuclear density of 2.3 x 1017 kg/m3 (One solar mass is 1.988 x 1030 kg)
Conservation of Angular Momentum A star with an initial radius of 1.0 x 108 m and...
Conservation of Angular Momentum A star with an initial radius of 1.0 x 108 m and period of 30.0 Earth days collapses suddenly to a radius of 1.0 x 104 m, while keeping essentially the same mass. This collapsed star is known as a neutron star. (a) What will be the angular velocity of the neutron star in rad/s and rot/s? (b) What will be the speed, in m/s, of an indestructible person standing on the equator of the neutron...
7&8 7. Antares is a star in Scorpius constellation. Its radius is 3.0AU and its mas...
7&8
7. Antares is a star in Scorpius constellation. Its radius is 3.0AU and its mas is about 12 times the mass of the sun. Antares orbital speed is 20.7 km/sec. Eventually after a couple million years Antares will be converted to a neutron star. Its radius will be 4.3*10-5 AU. Find its orbital speed after it becomes neutron star? Find your answer by rpm. Moment of inertia of sphere is = 2/5 MR2 - 8. A rotor disk in...
If a neutron star and a white dwarf has a total mass of 1M. If the white dwarf has a radius of 9 x 106 m and the neutron star has a radius of 11 km. i) Compare the surface gravity of both stars. ii) W...
If a neutron star and a white dwarf has a total mass of 1M. If the white dwarf has a radius of 9 x 106 m and the neutron star has a radius of 11 km. i) Compare the surface gravity of both stars. ii) What is the density of the neutron star? iii) Assuming the neutron star is entirely made up of neutrons, and that the interparticle separation of a gas of density n is l = n-1/3. How...
10. At the end of the Sun’s life it will use up the hydrogen and helium...
10. At the end of the Sun’s life it will use up the hydrogen and helium in its core and become a white dwarf. 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...
Please solve for Tf and how
fast the neuron star rotate in rotations per seconds.
Formation of a Neutron Star A star rotates with a period of 29 days about an axis through its center. The period is the time interval required for a point on the star's equator to make one complete revolution around the axis of rotation. After the star undergoes a supernova explosion, the stellar core, which had a radlus of 1.5 x 104 km, collapses into...
1, A star with a mass of 1.25 × 1031 kg and a radius of 3.45 × 105 km is initially rotating on its axis with a period of 24.0 days. The star collapses and becomes a neutron star with a radius of 12.5 km, retaining all of its original mass. Assume the star is a uniform solid sphere before and after the collapse, with a moment of inertia given by (2/5)MR2. What is the period of rotation after collapse?...
(Carroll and Ostlie, 16.16) (a) Determine the minimum rotation period for a 1.4 M. neutron star (the fastest it can spin without the centrifugal force being stronger than the gravitational force at the surface). Assume that the radius of the star is 10 km. (b) Use Newton's expression for the difference between Polar and Equatorial radii of a rotating object to estimate the flattening of a rotating neutron star (of course, it's a little harder in GR). The expression is...
Conservation of Angular Momentum A star with an initial radius of 1.0 x 108 m and period of 30.0 Earth days collapses suddenly to a radius of 1.0 x 104 m, while keeping essentially the same mass. This collapsed star is known as a neutron star. (a) What will be the angular velocity of the neutron star in rad/s and rot/s? (b) What will be the speed, in m/s, of an indestructible person standing on the equator of the neutron...
7&8
7. Antares is a star in Scorpius constellation. Its radius is 3.0AU and its mas is about 12 times the mass of the sun. Antares orbital speed is 20.7 km/sec. Eventually after a couple million years Antares will be converted to a neutron star. Its radius will be 4.3*10-5 AU. Find its orbital speed after it becomes neutron star? Find your answer by rpm. Moment of inertia of sphere is = 2/5 MR2 - 8. A rotor disk in...
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