The second option rolling friction
Answer:
comparing the anatomy of organisms
Explanation:
Basically, Rocks are the solid evidence used to date the earth.
Due to the changing in the genetic make up of organisms,the anatomy of organisms is not a reliable evidence to date the earth.
(C) 200 N
Explanation:
The acceleration due to gravity on earth
is given by

where
= universal gravitational constant
= mass of the earth
= radius of the earth
Planet Krypton has twice the mass of earth and 3 times the radius so its acceleration due to gravity
is



or

If we multiply both sides by Superman's mass, we get his weights on both planets:


Answer:
the electromagnetic force