If a current of 2 amps is moving through a circuit connected to a 9 v battery, what is the resistance of the circuit? ? 4.5 ohms 18 ohms 0.2 ohms 7 ohms i think that the answer might be d because 9-2 is 7? but i really don't know, if someone could explain how they got their answer that'd be great. millions.

b.transmitters send radio waves, and receivers capture radio waves.

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.