A positive test charge is a distance d from the negative source charge. What happens to the magnitude of the electric field if you investigate a point at 2d instead?
(choose below)
it gets bigger, by not by twice
it gets half as big
it gets smaller , but not by half
it gets twice as big
it stays the same

i think it stays the same but im not sure

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?