It is then converted into a ammonia.
The answer to this question would be: Object B must become negatively charged.
An object with a positive charge will exert pulling force to object with a negative charge but will push an object with a positive charge. If object A and B brought close together and object A have a positive charge, object B must be turned into a negative charge.
-- There's no limit to the distance of gravitational forces.
There's gravitational force between Pluto and the lint in your
pocket ... not much, but it's there, and it can be calculated.
So there's ALWAYS gravitational force between the Earth and the
spaceship, AND ALSO between the Moon and the spaceship.
Even before it's ever launched !
-- The Earth has about 80 times as much mass as the Moon has,
so you have to be much closer to the Moon before the gravitational
forces in each direction are equal.
Answer
Convection also known as ocean current is a phenomena which takes place within the ocean it takes place due to variation of temperature of oceanic water and due to wind on the surface of water. When temperature of oceanic waters increased that time density of water decreases. Less density water than reached above the cool water and due to wind which blows on the surface water it becomes cool or in other words we can say that water released its heat to the surrounding environment. when water becomes cool it again shifted in downward direction and less density water will moves upward. In this way this process will continue.
-- The potential difference (voltage) is the same across all components
that are connected in parallel.
-- The current is the same through all components that are connected in series.