Two identical waves are traveling toward each other in the same medium. one has a positive amplitude, meaning that its peaks only go upward, and the other wave has a negative amplitude, with peaks going downward. what will occur when the waves peak at the same place at the same time? constructive interference destructive interference a reflecting wave wave refraction

Modify the equation fδt=δ (mv) to find the force of friction.

The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.