A. seafloor spreading at mid-ocean ridges
It is "Jupiter" with the thickest atmosphere and largest planet , plus its density that smoothly varies from zero to the density of liquid hydrogen .
I would say the answer is D.
Ethnic conflicts has been a contemporary concern
Answer is give below
Explanation:
when any object or spacecraft is located exactly between Earth and Mars.
than Earth gravitational force will be exerted on spacecraft more than the Mars gravitational force.
as we know that gravity on the Mars is less than the gravity on the Earth
so spacecraft will move very slowly toward the Earth.
gravity force on Earth = 9.807 m/s²
gravity force on Mars = 3.711 m/s²
