How to determine the density of an unknown liquid using only a glass of water and a weighing scale?

Weigh a glass of water. Record the mass of a glass of water Msv.

Pour out the water. Record the mass of the glass without water Ms.

Find the mass of water that was in the glass:

Mw = Mw – Ms.

Pour an unknown liquid into a glass and weigh. Record the mass of the glass with liquid Mszh.

Find the mass of the liquid Mf = Mszh – Ms.

Masses of liquids through the volume of the glass V and density ρw and ρzh:

MV = ρvV, Mw = ρlV;

Мж / Мв = ρж / ρв;

Density of liquid ρl:

ρw = ρw * Mw / Mw = 1000 kg / m3 * (Mw / Mw).

Answer: You need to multiply the density of water by the ratio of the mass of the liquid to the mass of water.