The schwarzschild radius is the distance from an object at which the escape velocity is equal to the speed of light. a black hole is an object that is smaller than its schwarzschild radius, so not even light itself can escape a black hole. the schwarzschild radius depends on the mass of the black hole according to the equation = where is the gravitational constant and is the speed of light. consider a black hole with a mass of 5.7×107m⊙. use the given equation to find the schwarzschild radius for this black hole. schwarzschild radius: m what is this radius in units of the solar radius

1.

The Schwarzschild radius of an object of mass M is given by:

(1)

where

G is the gravitational constant

M is the mass of the object

c is the speed of light

The black hole in the problem has a mass of

where

is the solar mass. Substituting,

and substituting into eq.(1), we find the Schwarzschild radius of this black hole:

2) 242.8 solar radii

We are asked to find the radius of the black hole in units of the solar radius.

The solar radius is

Therefore, the Schwarzschild radius  of the black hole in solar radius units is

f=ma newton's second law 7x8=56n

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.