What is the velocity of an earth satellite that is in a circular orbit with a radius of 7.5 × 107 meters measured from the center of the earth?

2.9 × 103 meters/second

2.3 × 103 meters/second

7.5 × 103 meters/second

5.9 × 103 meters/second

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.

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

total distance/total time

(85 + 82)/(5+3)

167/8

20 just over