D.very small amounts of mass.
which of the following is not a barrier to physical activity it is fear of injury I think.
I believe the answer is F. This is because, F stands for Fluorine, which is an element and consists of one atom. A molecule consists of TWO OR MORE atoms held together by chemical bonds. F consists of only one atom, which is Fluorine. So the answer is C. Hope helped.
Answer: B
Explanation: This can be easily done by inputting 5280 * 2.2.
