Aboy rides on a pony that is walking at a constant velocity. the boy leans over to one side, and a scoop of ice cream falls from his ice cream come. describe the path if the scoop of ice cream as seen by the child and his parents.

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

snell's law

refractve index = sin incidence / sin refraction