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:

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer