Your annoying little brother is dropping rocks out of his bedroom window on the 2nd floor. you are on the ground floor and watch a rock fall past the patio door onto the ground below. in this problem, ignore air resistance. if the rock takes 0.28 s to cross the 2.3-m-high glass door, from what height above the top of the door was it dropped?

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

Which composition of water moves to begin a deepwater current?

4. now look at the green lines you created by connecting the three boiling point data points and the three melting point data points. for each of these lines, describe any trends you see. 5. locate the elements on your periodic table that you circled in green on your graph. what term or description would you use to identify these elements with respect to the periodic table? 7. using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers.