A student has two magnets of equal strength. She places one on each side of the ramp. She releases a steel ball down the ramp. The student repeats the procedure with both magnets on the same side of the ramp. Predict the path of the ball in each trial. Your Prediction:
What Happens:

What are chlorofluorocarbons and what impact do they have on the atmosphere?

In a system, when potential energy decreases, then entropy also decreases. true false

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?