The crust is less dense than the core because the crust isn't under pressure like the core is.
Answer:
d
Explanation:
because in 100 min segment s moves at 52.5 mph but segment r moves at about 32.5 aprox
Because the average of one measurement would yield to itself, which provides nothing new to us. We need at least two for average to be purposeful.
D because if you are heavier and standing higher up then you will have greater potential energy than someone who weighs less and is standing at a lower height.