List the forms of renewable energy that are curently in use

Drag each item into the proper state of matter category.

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.