The boy began to inspect the door. Elizabeth did the same.It seemed that door was locked. It could only be opened by solving a riddle.What can burn like the most terrible fires,To put out any flame or glare, such as water,But also to float like a flake,Which makes it very pleasant to the touch ... “Riddle again. I don't like riddles,” Alexander sighed.“I do,” smiled the girl. “Let's see. What could burn like fire? But also can put out the fire. A liquid ...”“Yes, I know this has to be, but what exactly?”“In chemistry we talked about substances ...”“Yes. Theoretically, Nitrogen, Hydrogen or Oxygen can be liquid, if they’re cooled to very low temperatures, but ...” “It might be water,” the girl tried to interrupt Alexander.“Nitrogen burns under certain conditions the skin and cools everything, so it can be use
Last Updated : 2022-01-15 Read more