Elston attached a spring scale to a box and pulls in across the floor. he then placed a book and pulls it in the same distance with the same effort. how does the force change after the book is placed in the box a. it will decrease
b. it could increase or decrease depending on the weight of the book.
c. it will increase
d. it could increase or decrease depending on the weight of the box.

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?

What characteristics of hv2112 make it the best candidate to be classified as a thorne-zytkow object?

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→∞.