Why are there 7 continents? ( actually provide a good answer not some answers from wiki )

[ou.01]which of these is the most likely use of an electromagnetic wave which has wavelength shorter than microwaves but longer than visible light? o heat food safely o neat food safely o take images of bones and teeth o transmit radio and cellular phone signals o take images of bones and teeth o transmit radio and cellular phone signals o detect the location of objects which emit heat

He resistance of a liquid to flowing is called

Which of the following countries was not an ally to the u.s.s.r. during the cold war? west germany poland romania cuba