Physics (Online w/ no teacher)

The mass of a certain neutron star is 3.0 X 10 to the 30th (1.5 solar masses) and its radius is 8,000 m (8 km). What is the acceleration of gravity at the surface of this condensed, burned-out star?

My answer was 31,265,625 X 10 to the 12th km/s squared.

  1. 👍 0
  2. 👎 0
  3. 👁 179
asked by Katie
  1. F/m= GM/r^2= 6.67E-11 * 3.0E30/64E6 m/s^2
    = yes, you are correct, except your number of significant digits is far excessive.

  2. The answer is G M/R^2, where G is the universal constant of gravity,
    6.67*10^-11 N m^2/kg^2.

    You missed the decimal point by a very wide margin, and you have too many significant figures.

    The correct answer is 3.1*10^12 m/s^2

    1. 👍 0
    2. 👎 0
    posted by drwls
  3. Thank you both!

    1. 👍 0
    2. 👎 0
    posted by Katie

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics Question

    Find the escape speed from (a) the Sun, (b) a white dwarf star with one solar mass (same as the Sun) and radius 10,000 km, (c) a neutron star of 2.0 solar masses and radius of 10.0 km, and finally (d) a star with 2 solar masses

    asked by Anon on November 11, 2016
  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? (Hint: Problem 4 states

    asked by Anonymous on November 27, 2011
  3. 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

    asked by Anonymous on October 11, 2015
  4. 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

    asked by Al on December 25, 2013
  5. Physics HELP!!

    The mass of a certain neutron star is 3.0 1030 kg (1.5 solar masses) and its radius is 7550 m. What is the acceleration of gravity at the surface of this condensed, burned-out star?

    asked by Steve on February 21, 2012
  6. 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

    asked by Karon on May 4, 2012
  7. 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 .

    asked by Anonymous on February 9, 2014
  8. 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

    asked by x on May 23, 2007
  9. 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? The value of the universal gravitational

    asked by Amanda and Leah on December 4, 2011
  10. 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? The value of the universal gravitational con-

    asked by Maggie A. on February 4, 2013

More Similar Questions