A piece of polystyrene packaging material (density = 19 kgm−3) that has a mass of 0.25 kg is tethered to the bottom of a container of water (density = 1×103 kgm−3) with a piece of string. What is the tension in the string?​

none, its a machine

1/0.14nm = 10^10/1.4 a lot

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.