You can change the height difference to an equivalent mercury expression by C. Multiply the height difference by the density of mercury and divide by the density of water.
How to change the height difference ?
The height of the liquid column in a barometer is determined by the balance between atmospheric pressure pushing down and the weight of the liquid column pushing up. The density of the liquid used in the barometer affects the height of the column.
To convert the height difference in water to an equivalent expression in mercury, you need to consider the densities of the two fluids. Since mercury is denser than water, you would need a shorter column of mercury to exert the same pressure as a taller column of water.
Therefore, to find the equivalent height in mercury, you multiply the height difference in water by the density of mercury and then divide by the density of water.
The options include:
Multiply the height difference by the density of water and divide by the density of mercury.
Divide the height difference by the density of water and multiply by the density of mercury.
Multiply the height difference by the density of mercury and divide by the density of water.
Divide the height difference by the density of mercury and divide again by the density of water.