FEW laboratory devices have achieved the popularity of the vacuum flask. Since Sir James Dewar designed it for the purpose of preventing his liquid air from rapid evaporation, the flask has become ...

This clip shows how a vacuum flask prevents heat loss. Detail of the design of the flask to prevent conduction, convection, radiation and evaporation is given. This includes the vacuum ...

This clip shows how a vacuum flask prevents heat loss. Detail of the design of the flask to prevent conduction, convection, radiation and evaporation is given. This includes the vacuum ...