Part 1: Identify A and T for the cosine function shown in (Figure 3). Express your answer as the amplitude (in m) followed by the period (in s), separated by a comma. Part 2: The amplitude of the wave in Part A is tripled and the period is cut in half. Which of the following graphs correctly illustrates this?

part C: What is the position of the ball at t=2.70s for the motion represented by the scenario in Part B? Express your answer to three significant figures.

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→∞.