5. amy and josh are coasting on their bicycles down a 10° slope at 15 m/s through still air. the mass of amy and her bicycle is 60 kg. the mass of josh and his bicycle is 90 kg. the cross-sectional area of amy and her bicycle is 0.45, while the cross-sectional area of josh and his bicycle is 0.60. the drag coefficient for both cyclists is 0.70. other than gravity and air resistance, the external forces acting on the two bicycle and rider systems are the same. which cyclist is more affected by air resistance? the answer is amy but what is the math invovled, show work and !

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→∞.