If you drop a rock from a height of 10 m, it accelerates at 9.8 m/s² and strikes the ground
1.42857 s later.
If you drop the same rock from half that
height, what will be its acceleration?

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

Need people build a dam to create a reservoir that supplies water a nearby city needs. describe two ways this action will likely affect the water cycle in the local environment. (5 points) worth 20 points