George observed a difference in measurements for the same item at different altitudes due to variation in gravity.
which type of scale did he likely use?
a) analytical scale
b) spring scale
c) balance

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