Pot of hot water

- Mar 21, 2020-

A hot kettle a hot kettle, also known as a thermos bottle or thermos flask, was invented by an English scientist named dewar. In 1900, he first turned compressed hydrogen into a liquid, liquid hydrogen. It had to be bottled, but there were no thermos bottles. He developed it himself. He used a vacuum, a double layer of bottles, which sucked the air out of the compartments and cut off the conduction.