Two electrons, each with mass m and charge q, are released from positions very far from each other. with respect to a certain reference frame, electron a has initial nonzero speed v toward electron b in the positive x direction, and electron b has initial speed 3v toward electron a in the negative x direction. the electrons move directly toward each other along the x axis (very hard to do with real electrons). as the electrons approach each other, they slow due to their electric repulsion. this repulsion eventually pushes them away from each other.

a. what is the minimum separation r_min that the electrons reach?

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answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.