5. A U-shaped tube contains mercury over a height of a few centimeters. We pour into one of the branches a mixture of water-ethyl alcohol which forms a liquid column of height hl= 30cm. In the other branch, we pour water pure density 1000 kg/m3, until both surfaces of the mercury come back in the same horizontal plane. We then measure the height of the water column h2=24 cm. a. Apply the fundamental relationship of hydrostatics for the three fluids. b. Deduce the density of the water-ethyl alcohol mixture. z 4 e Alcohol Water a Mercury