Superman must stop a 160-km/h train in 180 m to keep it from hitting a stalled car on the tracks. Part A
If the train's mass is 3.8×105 kg , how much force must he exert (find the magnitude)?
Express your answer using two significant figures.
Part B
Compare to the weight of the train (give as %).
Express your answer using two significant figures.
Part C
How much force(in magnitude) does the train exert on Superman?
Express your answer using two significant figures.

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.