Một chất điểm chuyển động trên trục Ox với phương trình chuyển động là: x = t2 - 10t + 5. Trong đó x tính bằng mét, t tính bằng giây. Vận tốc chất điểm lúc t = 3 s là

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.

answer; how far out of place which the object finished relative to the starting location;