Air becomes liquid at -190°C

Air becomes liquid at -190°C

Air is mainly nitrogen, oxygen and carbon. You can separate these components of air by slowly cooling it to -200 centigrade. At -79 C (CO2 boiling point) the carbon dioxide will become liquid and drop to the bottom where you can separate it.

Then cool it to -200C and the oxygen and nitrogen will turn to liquid. Next, in a fractionating column, gradually heat the liquid to -196C (Nitrogen boiling point) and the Nitrogen will gradually rise to the top and can be drained away, leaving you with pure oxygen.

https://sciencing.com/separate-oxygen-liquid-air-8757406.html

When you add salt to water the level goes down

When you add salt to water the level goes down

Why does walking in forests feel so good?

Why does walking in forests feel so good?

Now that’s sweet!

Now that’s sweet!