What method of separation would work best on a homogeneous mixture salt water? Select all that apply.
A filtration
B distillation
C screening
D evaporation

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.

answer: i don't know the answer good luck

explanation:

positive reinforcement? ?

the part of the wave he is travelling on is the crest