What is the specific gravity of gas supplied by the local purveyor?

The specific gravity of a gas is a measure of its density relative to air, which has a specific gravity of approximately 1. A specific gravity less than 1 indicates that the gas is lighter than air, while a value greater than 1 means it is heavier.

In this context, the specific gravity of the gas supplied by the local purveyor is indicated to be 0.6. This value suggests that the gas is lighter than air, which fits many common gases, such as methane or propane, that are often used in residential and commercial applications.

The other values presented as options indicate different densities. A specific gravity of 0.8 is again lighter than air but heavier than the chosen answer. A value of 0.5 would indicate a gas lighter than the one supplied, while a value of 0.4 would represent an even lighter gas. These values are not typical for commonly supplied gases from local purveyors. Thus, 0.6 is recognized as the most appropriate specific gravity for the gas in this scenario.