A sphere of volume 1.20×10−3m31.20×10−3m3 hangs from a cable. When the sphere is completely submerged in water, the tension in the cable is 29.4 NN. What is the buoyant force on the submerged sphere

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.

because if the tool that you are using is not balanced it there would be false mass.