Gravity??? Honestly don’t know.
Yes they are very well educated
By Sublimation, you can separate salt water from sand !!
and by Evaporation, salt can be separated from water !!
so all three are separated by these two process !!
Yes. It is the midpoint because the line would be GHJ and H is halfway between the 14 difference.
Answer:
The origin of the aurora begins on the surface of the sun when solar activity ejects a cloud of gas.
