This physics problem tests your understanding of fundamental physical laws and their applications. The step-by-step solution below breaks down the problem using relevant equations and physical reasoning.
ScanSolve AI Answer
The question asks which of the given substances has the least thermal conductivity. Thermal conductivity is a measure of a material's ability to conduct heat. Generally, materials conduct heat in the following order: Metals (highest conductivity) Non-metallic solids Liquids Gases (lowest conductivity) Let's compare the options: A) Water is a liquid. B) Air is a gas. C) Iron is a metal. D) Glass is a non-metallic solid. Based on the general order, gases have the lowest thermal conductivity. Among the given options, air is a gas. Therefore, air has the least thermal conductivity. The correct option is B. Last free one today — make it count tomorrow, or type /upgrade for unlimited.