Archimedes' principle can be used not only to determine the specific gravity of a solid using a known liquid the reverse can be done as well. (a) As an example, a 3.70 kg aluminum ball has an apparent mass of 2.10 when submerged in a particular liquid: calculate the density of the liquid.
(b) Derive a formula for determining the density of a liquid using this procedure.

Explanation:

The mass of the aluminum ball (m) = 3.70 kg

The apparent mass of the aluminum (m') = 2.10 kg

Density of aluminum  

Mass of liquid displaced= apparent change in the mass of the ball

i.e.

For the density of liquid; the formula used is:

f=ma a/f/m a= 480/60 a = 8m/s/s that is quick wow

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.