A group of physics students heat a vial of water, which has a balloon at the top that traps the water vapor and air. Describe how much the internal energy is changed by, if the students are adding heat to the water via a Bunsen burner. No need to calculate anything.

If forces acting on an object are unbalanced, which factors may result fron an unbalanced force? check all that apply

Place me with this question is my last question

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.