Neutron star-universal gravitational problem

posted by .

Hi, i'm having problem w/ this question...i've tried everything i know and i still don't get the right answer...here's the info they give:

Consider a neutron star of mass M = 1.99e+30kg and a radius of R = 10 km.

They ask 3 question...two of which i have answered (1st:gravitional acceleration near the surface of the star, i found to be 1.33e12 m/s/s and 2nd: found the velocity of an object if it was 1.1 m away from the surface of the star to be 1.71e6 m/s.) but the question that i haven't been able to answer is this: Assuming uniform density, how much would 1.1 cubic centimeters of neutron star material weigh on the surface of the earth?

HELP!!!....i got this far..desity of the star w/ radius 10 km..1.99e+30kg/4.19e12 (meters cubed) = x (kg)/1e-6 (meters cubed) and then the answer from that i multiplied by 9.81...but that's not the right answer...what am i doing wrong??


sorry i finally found the answer...i just made some errors in the unit conversion

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physic

    Neutron stars are extremely dense objects with a mass comparable to the mass of the sun but a radius of only several thousand meters. Consider a neutron star of mass M = 1.99e+030 kg and a radius of R = 10 km. g = 1.3279e12 m/s Assuming …
  2. physics

    The volume of a neutron is about 10−45 cubic meters. Suppose you packed the number of neutrons you found for problem 4 into a cube so that the neutrons touched edge to edge. How big would the cube be?
  3. Physics

    The mass of a certain neutron star is 5 × 10^30kg (2.5 solar masses) and its radius is 2000 m. What is the acceleration of gravity at the surface of this condensed, burned-out star?
  4. chemistry

    assuming that a neutron star has the same density as a neutron, calculate the mass in kilograms of a small piece of a neutron star the size of a spherical pebble with a radius of 0.11mm
  5. Physics

    The mass of a certain neutron star is 1 × 1031 kg (5 solar masses) and its radius is 5500 m. What is the acceleration of gravity at the surface of this condensed, burned-out star?
  6. Physics

    The mass of a certain neutron star is 1 × 1031 kg (5 solar masses) and its radius is 5500 m. What is the acceleration of gravity at the surface of this condensed, burned-out star?
  7. physics (Newton's Law of gravitation)

    I need help with this question until the end if you can, please. Thank you. A neutron star and a black hole are 2.400e+12 m from each other at a certain point in their orbit. The neutron star has a mass of 2.78×10^30 kg and the black …
  8. physics

    Assume that the mass of a neutron star is 1.5 times that of the Sun and the radius of the neutron star is 10 km. Ignore effects of Special Relativity. What is the approximate speed at which an object released from far away (at zero …
  9. chemistry

    Assuming that a neutron star has the same density as a neutron, calculate the mass in kilograms of a small piece of a neutron star the size of a spherical pebble with a radius of 0.30mm .
  10. Chemistry

    Neutron stars are composed of solid nuclear matter, primarily neutrons. Assume the radius of a neutron is approx. 1.0 x 10^-13 cm. Calculate the density of a neutron. [Hint: For a sphere V=(4/3) pi r^3. Assuming that a neutron star …

More Similar Questions