Certain neutron stars (extremely dense stars) are believed to be rotating at about 0.70 rev/s. If such a star has a radius of 19 km, what must be its minimum mass so that material on its surface remains in place during the rapid rotation

The minimum mass so that material on its surface remains in place during the rapid rotation is  .        

Explanation:

Given that,

Certain neutron stars are believed to be rotating at about 0.70 rev/s.

Radius of the star, r = 119 km

When the star rotates the gravitational force is balanced by the centripetal force as :

So, the minimum mass so that material on its surface remains in place during the rapid rotation is  .

what are the statements? x

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.