Kerosene is poured into the left tube of the communicating vessels, water is poured into the right one.

Kerosene is poured into the left tube of the communicating vessels, water is poured into the right one. The height of the kerosene column is 35 cm. What is the height of the water column?

Given:

ro1 = 1000 kg / m3 – water density;

ro2 = 800 kg / m3 – density of kerosene;

g = 10 m / s2 – free fall acceleration;

h2 = 35 centimeters – kerosene level.

It is required to determine the water level h1 (centimeter).

The pressure in the left and right tubes of the communicating vessels will be equal. Then:

P1 = P2;

ro1 * g * h1 = ro2 * g * h2;

ro1 * h1 = ro2 * h2;

h1 = ro2 * h2 / ro1 = 800 * 35/1000 = 28000/1000 = 28 centimeters.

Answer: the water level in the right tube of the communicating vessels will be 28 centimeters.