Matter can undergo chemical reactions and nuclear reactions, Which statement is true for both types of reactions?
A. The reactants have the same numbers of atoms as the products,
B. They conserve mass.
C. They involve breaking and making chemical bonds,
D. They have reactants and products,

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.

When solid surfaces slide over each other the kind of friction that occurs is called friction

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→∞.