What is momentum equal to

mass x velocity

Explanation:

The momentum of an object is the product of its mass and velocity;

   Momentum  = mass x velocity

Mass is the quantity of matter in a body

Velocity is the rate of change of displacement with time.

Also, momentum is used to quantify the particular amount of motion a body can give.

i don't know, you need to give me some answers.

explanation:

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.