You are given a uniformly charged spherical shell that has a radius R and carries positive charge q. In order to measure the electric field magnitude inside, you drill a small hole that removes 0.01% of the shell's material and insert a probe into the shell. What is the approximate magnitude of the electric field at the shell center? Express your answer in terms of the Coulomb's constant k and some or all of the variables q, R.

a and b sometimes have a positive value

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.

the right answer is 0.3 meters per second