If you measure my hairline you will get about 90°
Answer:
igneous rock is the correct answer
You calculate the mass using dimensional analysis.
We are given with
The weight of the chain per unit length which is 2.16 kg/m
We are also given with the needed length of the chain which is 7.0 m
Therefore, the mass of the chain is
7.0 m x 2.16 kg / m = mass of the chain in kg<span />