Aman walke towards the bus stop 100 meters away at a constant velocity. he reaches the bus stop in 200 seconds. once at the bus stop, he sits for 500 seconds waiting for the bus. he then realizes he forgot something and runs home at a speed of 2.0 meters/second.

what is the velocity, displacement, and the time?

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.