In the figure below, each charged particle is located at one of the four vertices of a square with side length = a. In the figure, A = 5, B = 2, and C = 3, and q > 0. Four positive charges are organized in a square configuration, with one charge at each vertex of the square. Each side of the square is labeled a. The upper left corner has charge A q, the upper right corner has charge q, the lower right corner has charge C q, and the lower left corner has charge B q. (a) What is the expression for the magnitude of the electric field in the upper right corner of the square (at the location of q)? (Use the following as necessary: q, a, and ke.) E =     Give the direction angle (in degrees counterclockwise from the +x-axis) of the electric field at this location. ° (counterclockwise from the +x-axis) (b) Determine the expression for the total electric force exerted on the charge q. (Enter the magnitude. Use the following as necessary: q, a, and ke.) F =     Give the direction angle (in degrees counterclockwise from the +x-axis) of the electric force on q. ° (counterclockwise from the +x-axis) (c) What If? How would the answers to parts (a) and (b) change if each of the four charges were negative with the same magnitude? Select all that apply. The electric field would be the same magnitude but opposite direction as the field in part (a).The force would be the same magnitude and direction as the force in part (b).The electric field would be the same magnitude and direction as the field in part (a).The force would be the same magnitude but opposite direction as the force in part (b).

60.0 magnitude direction 0.500 mm (a) Red blood cells often become charged and can be treated as point charges. Healthy red blood cells are negatively charged, but unhealthy cells (due to the presence of a bacteria, for example) can become positively charged. In the figure, three red blood cells are oriented such that they are located on the corners of an equilateral triangle. The red blood cell charges are A = 2.30 pC, B = 7.30 pC, and C= -3.90 pC. Given these charges, what would the magnitude and direction of the electric field be at cell A? (1 pC = 1 x 10-¹2 C.) N/C counterclockwise from the +x-axis.

Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.140 N when their center-to-center separation is 63.8 cm. The spheres are then connected by a thin conducting wire. When the wire is removed, the spheres repel each other with an electrostatic force of 0.0403 N. Of the initial charges on the spheres, with a positive net charge, what was (a) the negative charge on one of them and (b) the positive charge on the other? (Assume the negative charge has smaller magnitude.)

One particle has a mass of 3.71 x 10‍3 kg and a charge of +7.56 µC. A second particle has a mass of 7.17 x 103 kg and the same charge. The two particles are initially held in place and then released. The particles fly apart, and when the separation between them is 0.177 m, the speed of the 3.71 x 103 kg-particle is 126 m/s. Find the initial separation between the particles. V1,B V2,B 92 92 91 Number i Units "B 91