A U tube contains water and methylated spirts separated by mercury columns in the two arms are in level with 10.0cm of water in one arm and 12.5 cm of spirit in the other. What is the relative density of spirit?

Explanation

To solve the problem of finding the relative density of methylated spirit in a U-tube containing water and spirit separated by mercury, we can follow these steps:

### Step 1: Understand the Setup
We have a U-tube with two arms. One arm has a column of water that is 10.0 cm high, and the other arm has a column of methylated spirit that is 12.5 cm high. Both columns are separated by a column of mercury.

### Step 2: Apply the Principle of Hydrostatic Pressure
At the same horizontal level in both arms of the U-tube, the pressure must be equal. Therefore, we can set up the equation based on the pressures exerted by the columns of water and spirit.

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