Where do most comets in our solar system come from?

Which describe reflection? check all that apply. light bounces off a boundary.

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?

For which pair of objects would adding the same a