Ben walks 500 meters from his house to the corner store. He then walks back toward his house, but continues 200 meters past his house to talk to a neighbor. It takes Ben 17 minutes from the time he leaves his house until he stops
to talk to his neighbor.
What is Ben's average velocity? Round to the nearest tenth.
O 0.2 m/s
O 0.5 m/s
O 0.7 m/s
O 1.2 m/s

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)

f=ma a/f/m a= 480/60 a = 8m/s/s that is quick wow

snell's law

refractve index = sin incidence / sin refraction