HELP ASAP I WILL MARK BRAINLEST The diagram below shows a boat moving north in a river at 3 m/s while the current in the
river moves south at 1 m/s.
How will the boat be affected if it enters a part of the river where the current is moving south
at 2 m/s?
F The boat will move slower.
G The boat will move faster.
H The boat will stop.
J The boat will move to the west.

Contains chemical energy. a. heat b. light c. natural gas

The illuminance of a surface varies inversely with the square of its distance from the light source. if the illuminance of a surface is 120 lumens per square meter when its distance from a certain light source is 6 meters, by how many meters should the distance of the surface from the source be increased to reduce its illuminance to 30 lumens per square meter?

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→∞.