In about 5 billion years, at the end of its lifetime, our sun will end up...
In about 5 billion years, at the end of its lifetime, our sun will end up as a white dwarf, having about the same mass as it does now, but reduced to about 15,000 km in diameter.What will be its density at that stage, in g/cm3
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In about 5 billion years, at the end of its lifetime, our sun
will end up...
4、15 pts Some five billion years from now, the Sun will have exhausted its hydrogen fuel...
4、15 pts Some five billion years from now, the Sun will have exhausted its hydrogen fuel and blown off its outer layers. The remaining core of the sun will be a hot, dense white dwarf star. Assuming that the white dwarf has a radius roughly equivalent to Earth's and a remaining mass of 0.60 Mo, what is the acceleration due to gravity at its surface? (Mo is the present day mass of the sun). Compare this value to-g. the acceleration...
After our Sun exhausts its nuclear fuel, its ultimate fate may be to collapse to a...
After our Sun exhausts its nuclear fuel, its ultimate fate may be to collapse to a white dwarf state, in which it has approximately the same mass as it has now but a radius equal to roughly the size of the Earth's radius. (a) Calculate the average density of this white dwarf if the Sun were to collapse to a radius of 6.25 x 10°m. kg/m (b) Calculate the free-fall acceleration at its surface. m/s2 (c) Calculate the gravitational potential...
After our Sun exhausts its nuclear fuel, its ultimate fate may be to collapse to a...
After our Sun exhausts its nuclear fuel, its ultimate fate may be to collapse to a white dwarf state, in which it has approximately the same mass as it has now but a radius equal to roughly the size of the Earth's radius. (a) Calculate the average density of this white dwarf if the Sun were to collapse to a radius of 6.18 x 10 m. O kg/m3 (b) Calculate the free-fall acceleration at its surface. Cm/s2 (c) Calculate the...
Suppose our Sun eventually collapses into a white dwarf, losing about half its mass in the process, and winding up with...
Suppose our Sun eventually collapses into a white dwarf, losing about half its mass in the process, and winding up with a radius 1.0% of its existing radius. Assuming the lost mass carries away no angular momentum, what would the Sun's new rotation rate be? (Take the Sun's current period to be about 30 days.) What would be its final KE in terms of its initial KE of today?
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...
1. Given the Sun's lifetime is about 10 billion years, estimate the lifetime of stars with...
1. Given the Sun's lifetime is about 10 billion years, estimate the lifetime of stars with (a)0.2-solar mass, (-5 x 10yr) (b) 3.0 solar mass, (4 x 10 yr) (c)10.0-solar mass x 10 yr) 2. A star is lying 20 pc from the Sun. The star's position on the sky is observed to move 5 arc sec per year relative to background stars. What is the star's transverse (perpendicular to the line of sight) velocity? If the observed red-shift is...
Consider a white dwarf with the same mass as our sun. What would its radius need...
Consider a white dwarf with the same mass as our sun. What would its radius need to be in Earth radii) to have an escape speed of 7000 kilometers per second?
Consider a white dwarf with the same mass as our sun. What would its radius need to be (in Earth radii) to have an escape speed of 7000 kilometers per second?
Consider a white dwarf with the same mass as our sun. What would its radius need to be (in Earth radii) to have an escape speed of 7000 kilometers per second?
choose A B C D QUESTION 5 When astronomers look at globular clusters they don't see...
choose A B C D QUESTION 5 When astronomers look at globular clusters they don't see any stars hotter/more luminous than our Sun. What does this mean for the age of the globular cluster? The globular cluster doesn't have enough gravity to capture any stars more massive than our sun yet. The globular cluster is younger than the typical lifetime of a star like our Sun. The globular cluster is older than the typical lifetime of a star like our...
Our sun's density at its core (which consists primarily of electrons and protons) is about 80...
Our sun's density at its core (which consists primarily of electrons and protons) is about 80 g/cm^3 Express the density in SI units. The lunar mass is about 7.35 times 10^22 kg (which is 0123 of earth's mass) and the radius is 1738 km. Estimate the mean density of the moon and compare it to the mean density of the earth. Any interesting conclusions?
4、15 pts Some five billion years from now, the Sun will have exhausted its hydrogen fuel and blown off its outer layers. The remaining core of the sun will be a hot, dense white dwarf star. Assuming that the white dwarf has a radius roughly equivalent to Earth's and a remaining mass of 0.60 Mo, what is the acceleration due to gravity at its surface? (Mo is the present day mass of the sun). Compare this value to-g. the acceleration...
After our Sun exhausts its nuclear fuel, its ultimate fate may be to collapse to a white dwarf state, in which it has approximately the same mass as it has now but a radius equal to roughly the size of the Earth's radius. (a) Calculate the average density of this white dwarf if the Sun were to collapse to a radius of 6.25 x 10°m. kg/m (b) Calculate the free-fall acceleration at its surface. m/s2 (c) Calculate the gravitational potential...
After our Sun exhausts its nuclear fuel, its ultimate fate may be to collapse to a white dwarf state, in which it has approximately the same mass as it has now but a radius equal to roughly the size of the Earth's radius. (a) Calculate the average density of this white dwarf if the Sun were to collapse to a radius of 6.18 x 10 m. O kg/m3 (b) Calculate the free-fall acceleration at its surface. Cm/s2 (c) Calculate the...
1. Given the Sun's lifetime is about 10 billion years, estimate the lifetime of stars with (a)0.2-solar mass, (-5 x 10yr) (b) 3.0 solar mass, (4 x 10 yr) (c)10.0-solar mass x 10 yr) 2. A star is lying 20 pc from the Sun. The star's position on the sky is observed to move 5 arc sec per year relative to background stars. What is the star's transverse (perpendicular to the line of sight) velocity? If the observed red-shift is...
Consider a white dwarf with the same mass as our sun. What would its radius need to be in Earth radii) to have an escape speed of 7000 kilometers per second?
Our sun's density at its core (which consists primarily of electrons and protons) is about 80 g/cm^3 Express the density in SI units. The lunar mass is about 7.35 times 10^22 kg (which is 0123 of earth's mass) and the radius is 1738 km. Estimate the mean density of the moon and compare it to the mean density of the earth. Any interesting conclusions?
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