Question

Problem 2 5 x 1031 kg and a radius of 3.45 x 105 km is initially rotating on A star with a mass of 1.2 its axis with a period of 24.0 days (remember, the period is the time it takes to complete one full revolution). Suppose the star collapses in on itself and becomes a neutron star with a radius of 12.5 km, retaining all of its original mass. What is the period of rotation after collapse? Give your answer in seconds. Assume the star is a uniform solid sphere before and after the collapse, with a moment of inertia given by (2/5)MR2. Hint: solve this problem by using conservation of angular momentum.

media%2F58e%2F58ee7191-0062-4322-a8ff-1d

already did problem 2 which is 2310 and the period is .00272 i need help on extra credit problem

0 0
Add a comment Improve this question Transcribed image text
Answer #1

oao eic Energ of Star beler e ellapse 5 T is pCriod in Sec Tx 6o x 60 Sec. 2. Give ME 1.25x10 31 kg k.Tc !× 1.25X1ofk@y2x((08 Mart 4 x6ox 60 Rotational KE aftor Ne l ee Sina M is ame nelo R」 = 12.5-kin - M11-25 x 1031 kg ime penobest of luck!

Add a comment
Know the answer?
Add Answer to:
already did problem 2 which is 2310 and the period is .00272 i need help on...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
  • 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?...

  • need help on C. Conservation of angular momentum A spherical star with radius R1 7.96 x...

    need help on C. Conservation of angular momentum A spherical star with radius R1 7.96 x 10 km and rotating with angular speed (o 3,92 x 10s rad/s suddenly collapses into a neutron star. The neutron star emits a beam of X-rays directed radially outward that can be seen by an observatory on the earth r 4.55 x 104 km from the star. The X-ray beam sweeps past the earth with a tangential speed v 7.40 x 10 km/s each...

  • 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...

  • 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...

  • 10*) The Sun has approximate radius 7×108 m, and rotates around its axis once every 27...

    10*) The Sun has approximate radius 7×108 m, and rotates around its axis once every 27 days. a) Find its angular velocity in rad/s, and (assuming it is a uniform sphere) write a formula for its angular momentum expressing it in terms of its mass M (you do not need to substitute a value for M). b) Suppose the Sun were to collapse to a neutron star, which is a much denser state, without losing any mass and without being...

  • An isolated star with the radius of the Sun (6.95 × 108 m) rotates on an...

    An isolated star with the radius of the Sun (6.95 × 108 m) rotates on an axis through its centre once every 2.16 × 106 s. It collapses under gravity to form a much denser star with the radius of the Earth (6.38 × 106 m). For the purposes of this question, you may assume that no matter is lost from the star during its collapse. You may also treat the star as a homogeneous sphere before and after the...

  • PartA Constants Suppose a star the size of our Sun, but with mass 9.0 times as...

    PartA Constants Suppose a star the size of our Sun, but with mass 9.0 times as great, were rotating at a speed of 1.0 revolution every 10 days. If it were to undergo gravitational collapse to a neutron star of radius 12 km, losing three-quarters of its mass in the process, what would its rotation speed be? Assume also that the thrown-off mass carries off either no angular momentum Express your answer using two significant figures. A2c rev/s Part B...

  • Question 16 A sun-like star with mass M = 2.00 x 1030 kg and radius R...

    Question 16 A sun-like star with mass M = 2.00 x 1030 kg and radius R = 7.0 x 10% km rotating once per month collapses into a neutron star (r = 16 km). What is the rotational speed of the sun-like star in rev/s? (1 month - 30 days, 1 year = 365 days, and 1 day = 86400 s.) 30.0 rew's 3.86 x 107 revi's 1.16 x 105re's 0.03 rew's 2.74x10 rew's 10 rew's 10 pts D Question...

  • 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...

  • A rotor disk in your car's wheel with radius of 30.0 cm and mass of 15.0...

    A rotor disk in your car's wheel with radius of 30.0 cm and mass of 15.0 kg rotates with 800 rpm and it slows down to 50 rpm in 10 second. Find its angular acceleration? (b) Number of revolutions during this period of time (c) The required force to do this action during this period of time. Antares is a star in Scorpius constellation. Its radius is 3.0AU and its mas is about 12 times the mass of the sun....

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT