When growing bones widen through appositional growth, what kind of cells add bone matrix to the outside of the diaphysis

How many years would it take the atlantic ocean to grow 500 centimeters? show your work.

Long term exposure to waves can cause sunburns and skin cancer.

You are working in the lab and are working with the same element but with varying isotopes of the element. you are working with c-11, c-13, c-14, and c-15. what is the average atomic mass of this element? (use periodic table) a- 12 b-15 c-14 d-13