Answer:
The focal length of a lens is refers to the distance from the center of the lens to the principal foci.
Neglecting friction and air resistance, the first hill must be built 4 times higher than it is now.
The movements of the tectonic plates
The North Pole would be your answer
Answer:
E. The wheel with spokes has about twice the KE.
See explanation in: https://quizlet.com/100717504/physics-8-mc-flash-cards/
