Two sound waves, from two different sources with the same frequency, 500 Hz, travel in the same direction at 340 m/s. The sources are in phase. What is the magnitude of the phase difference of the waves at a point that is 3.68 m from one source and 5.79 m from the other

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.

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000