What is the best description of the constructive inference of light?

a. a longitudinal wave meets a transverse light wave
b. two waves have the same direction of displacement
c. two waves have displacement in opposite directions
d. a mechanical wave meets an electromagnetic wave

Why does the input force have to be greater than the force needed to lift the bale?

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=

Which of the following is not a means to accelerating? question 4 options: a)increase speed b)remain still c)decrease speed d)change direction