A car of mass 1000 kg moving at 20 m/s collides with a 5000 kg truck at the initial velocity of 10 m/s. After the collision, the car continues in the same direction with a
velocity of 10 m/s. Neglecting friction, the velocity of the truck after the collision
is__m/s. (Round to the nearest tenth).

the answer is c.)

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.