If the specific gravity of mercury is 13.6 and the atmospheric pressure is 70cm of mercury, what is the total pressure of gas supply in cm of water

To find the total pressure of the gas supply in cm of water, you need to convert the units from specific gravity of mercury (Hg) to cm of water. Here's how you can do it:

1. Determine the conversion factor:
The specific gravity of mercury is defined as the ratio of its density to the density of water.
Density of water = 1 g/cm^3
Density of mercury = 13.6 g/cm^3

So, the conversion factor from mercury to water is:
Conversion factor = 13.6 * 1 = 13.6

2. Convert the atmospheric pressure from cm of mercury to cm of water:
Given atmospheric pressure = 70 cm Hg

To convert from cm Hg to cm water, multiply by the conversion factor:
Pressure in cm water = atmospheric pressure x conversion factor = 70 cm x 13.6

Therefore, the total pressure of the gas supply in cm of water is 952 cm.

Please note that this conversion assumes standard conditions and does not take into account any other factors such as temperature or humidity.