Astronomers study many different kinds of objects in our Solar System. Which of the following best describes a difference between comets and asteroids?
A. Comets orbit planets, and most asteroids orbit the Sun.
B. Comets are hot balls of gas, and asteroids are made mostly of ice.
C. Comets are made mostly of ice, and asteroids are made mostly of rocks.
D. Comets orbit the Sun between Mars and Jupiter, and asteroids form patterns
in the sky.

Intro: a solid ball of radius rb has a uniform charge density ρ. part a: what is the magnitude of the electric field e(r) at a distance r> rb from the center of the ball? express your answer in terms of ρ, rb, r, and ϵ0. part b: what is the magnitude of the electric field e(r) at a distance r express your answer in terms of ρ, rb, r, and ϵ0. part c: let e(r) represent the electric field due to the charged ball throughout all of space. which of the following statements about the electric field are true? check all that apply. e(0) = 0 e(rb)=0 limr→∞e(r)=0 the maximum electric field occurs when r=0 the maximum electric field occurs when r=rb the maximum electric field occurs as r→∞.