What source of mineral with the deficiency "It is present in so many foods; it makes it highly unlikely that there would be a deficiency"?

How does friction with the atmosphere affect the speed of an artificial satellite

Which does not describe a physical change happening to water? water evaporating in the sun water reacting with nitrogen gas water freezing and being broken apart with a knife water heating up on a stove

According to the article, what valid claim came from the national research council? there is no association between fluoride exposure and increased cancer risk in humans. there is a possible link between fluoride exposure and increased cancer risk in humans. there is a definite link between fluoride exposure and increased cancer risk in humans.