When temperatures are lowered steadily, below water’s freezing point, (0 ºC), nitrogen, which is the major element of air, becomes liquid. Lowering the temperature further, at about -269 ºC, helium, which is the most…
When temperatures are lowered steadily, below water’s freezing point, (0 ºC), nitrogen, which is the major element of air, becomes liquid. Lowering the temperature further, at about -269 ºC, helium, which is the most…