Una sfera conduttrice di raggio R=3,7 m ha una densità superficiale di carica pari a 5,7 uC/m?. Calcola l'intensità del campo elettrico:
a) in un punto distante R/2 dal centro
b) in un punto distante 2R dal centro

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.

there are no components of a physical goal mentioned on the list of choices that you've provided.