This is because Hg is an abbreviation of the Latin name of the element, which was hydrargium. With this name the Greeks were referring to the fact that mercury is a silvery liquid at room temperature, rather than a solid like other metals.
We've looked at the three types of heat transfer. Conduction and convection rely on temperature differences; radiation does, too, but with radiation the absolute temperature is important.
When two bodies are placed in thermal contact and energy flows from the warmer body to the cooler one,we call the process heat. A transfer of energy to or from a system by any means other than heat is called work.hen two bodies are placed in thermal contact and energy flows from the warmer body to the cooler one,we call the process heat. A transfer of energy to or from a system by any means other than heat is called work.