How are earthworms connected with soil fertility? a) they eat essential nutrients and reduce the fertility of the soil. b) they increase soil fertility by fixing nitrogen compounds in the soil. c) they increase soil fertility by converting dead leaves into rich humus. d) they convert minerals in the soil to compounds that are harmful to plants.

The metric unit of electrical power is the watt volt ampere ohm

Coal contains energy. a. light b. kinetic c. chemical d. mechanical

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→∞.