UTF-8 Elec_Force_pg2_7_10_08 Electrical Force In the simulation window there are two neutral atoms, meaning they have no electrical charge. By clicking on the blue triangle icon you can run the simulation and see how the particles behave with one another. As the particles interact with one another the program calculates the Kinetic Energy (KE), Potential Energy (PE), and the Total Energy (TE) of the particles. To see how electrical charge influences the behavior of particles, you will also be adding negative and positive charges to the atoms using the (+) and (-) icons in the upper left-hand corner of the simulation window. Follow the instructions below, and make sure to pay attention to the energy graphs as well. There will also be questions that correlate with the different simulations that you are constructing for you to answer at the end. Instructions: Now that you have seen how the two neutrally charged particles interact, it is time to add electrical charge. By clicking on the yellow icon with the (+) sign in the middle (upper left-hand corner of simulation window) a tool that resembles an oil can will be prompted up. Take that tool and click on the left particle until the charge reads +2.5. You should now have one neutral particle and one red positive particle. Click on the blue triangle icon to begin the simulation. After viewing what happens, click the PAUSE/STOP icon to stop the simulation. Then click on the blue icon to the very left, and click YES so the state of the model goes to its original state with two neutral particles. Repeat this procedure with the following situations: A) One negatively charged particle (-2.5) and one neutral particle B) Both particles negatively charged (-2.5) C) One negatively charged particle (-2.5) and one positively charged particle (+2.5) D) Both particles positively charged (+2.5)
1 25 14 0 0 25514 14 255 0 014 14 255 0 014 14 0 0 25514 14 0 0 25514 14 14true 14 14true 14 org.concord.mw2d.activity.AtomContainer KE_PE_GRAV_7.10.08\$0.mml org.concord.modeler.PageXYGraph 0 Time (fs) Kinetic Energy/Particle Potential Energy/Particle Total Energy/Particle 350 350 x y 270 45 -1 -1 org.concord.modeler.PageBarGraph Kinetic Energy/Particle 100 200 true 5 10 true -ffff01 0 -5.0 5.0 0.1560106724500656 org.concord.modeler.PageBarGraph Potential Energy/Particle 100 200 true 5 10 true -10000 0 -5.0 5.0 -0.8864549398422241 org.concord.modeler.PageBarGraph Total Energy/Particle 100 200 true 5 10 true 0 -5.0 5.0 -0.7304443120956421 true20true true20true 14 14 14 14 14 14 14 org.concord.modeler.PageMultipleChoice false 6 550 200 <html> <head> </head> <body marginwidth="5" marginheight="5"> For which case(s) did the particles start moving toward or away from each other due to the electrical force after they are released? Choose ALL correct answers. </body> </html> true Case A: Neither particle is electrically charged (charge = zero) Case B: One particle has no charge and one has a negative charge Case C: One particle has no charge and one has a positive charge Case D: One particle is positively charged and the other negatively charged Case E: Both particles are positively charged Case F: Both particles are negatively charged 3 4 5 -666601 org.concord.modeler.PageMultipleChoice false 6 550 200 <html> <head> </head> <body marginwidth="5" marginheight="5"> For which case(s) did the particles start moving TOWARD each other after they were released? This is the particles attracting each other due to the electrical force! Choose ALL correct answers. </body> </html> true Case A: Neither particle is electrically charged (charge = zero) Case B: One particle has no charge and one has a negative charge Case C: One particle has no charge and one has a positive charge Case D: One particle is positively charged and the other negatively charged Case E: Both particles are positively charged Case F: Both particles are negatively charged 3 -339901 org.concord.modeler.PageMultipleChoice false 6 550 200 <html> <head> </head> <body marginwidth="5" marginheight="5"> For which case(s) did the particles start moving AWAY from each other after they are released? This indicates the particles repel each other due to the electrical force! Choose ALL correct answers. </body> </html> true Case A: Neither particle is electrically charged (charge = zero) Case B: One particle has no charge and one has a negative charge Case C: One particle has no charge and one has a positive charge Case D: One particle is positively charged and the other negatively charged Case E: Both particles are positively charged Case F: Both particles are negatively charged 4 5 -6667 14 14 14 14