Witch force is represented by arrow at c?

The air that we breath is made mostly of which gaseous molecule

During the apollo moon missions, astronauts were concerned about the effects of newton's third law of motion when: o a. they ejected waste water, because they were concerned that it would push them off course. o b. they reentered earth's atmosphere, because they were carrying heavy moon rocks. o c. they took off from earth, because a large force was required to generate large acceleration. o d. they detected incoming space debris, because the inertia of the debris could damage their ship.

How does the strength of the electrostatic force between an electron and a proton compare to the strength of the gravitational force between them?