What type of interaction will change the waves speed the most reflection and refraction diffraction or interference

so easy. just google the electromagnetic waves and it’ll pop up.

high-sugar diet and high cholesterol

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form

the components of a vector are the parts of the vectors that are to each other.

b perpendicular