Please help!! A certain antelope once ran 1.6 km with an average speed of 67 km/h. The antelope’s speed for the first half (0.80 km) was 88 km/h. A) How long did it take to do the the 1.6 km? B) How long did it take to do the first half? C) Using your answers from the previous two parts, how long did the second half take to run? D) Lastly, what was the average speed for the second half?

radiation warms things up temp rises convection currents air circ windy weather

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.