Now we will consider a two-dimensional arrangement of charges. a point charge q1=2.0μc is located on the positive y-axis at y=0.30m, and an identical charge q2 is at the origin. find the magnitude and direction of the total force that these two charges exert on a third charge q3=4.0μc that is on the positive x-axis at x=0.40m. what is the magnitude of the net force on q3 if q1=2.0μc, as in the example, but q2=−3.0μc? express your answer in newtons to two significant figures. what is the direction of the force on q3 if q1=2.0μc, as in the example, but q2=−3.0μc? express your answer in degrees below the −x axis as an integer.

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?

What are the necessary conditions for fusion?

Aflask with vinegar in it has a mass of 160 grams. a balloon with baking soda in it has a mass of 40 grams. the balloon is attached to the flask to seal the opening and the vinegar and baking soda mixes. the balloon inflates to a large volume. what will the total mass of the balloon and flask be after the balloon inflates? explain. a) less than 200 grams because the solid baking soda disappears. b) 200 grams, because all the atoms remain in the balloon or flask. c) more than 200 grams because the size of the balloon is so much larger. d) less than 200 grams because gases such as the one in the balloon are lighter than solids and liquids.