Part A Suppose Q1=3.8 nC and Q2 = 7.6 nC (Figure 1). @ Figure 1 of 1 F SO What is the strength of the electric field at the position indicated by the dot in the figure? Express your answer with the appropriate units. E = 2.9×104 Submit Previous Answers Correct Part B What is the direction of the electric field at the position indicated by the dot in the figure? Specify the direction as an angle measured clockwise from the positive y axis. Express your answer in degrees. ΜΕ ΑΣΦ ? Submit Previous Answers Request Answer X Incorrect; Try Again; 2 attempts remaining Provide Feedback Q Fa DI # % & 3 4 5 6 7 8 9 W E R T Y U S D F G H J K L P { Χ C V B N M H H command option command ? 12 Next> delete retur Submit X Incorrect Figure 1 of 1 Provide Feedback X 5.0 cm Q1 + 10 cm F1 F2 @ 1 2 Q W A S Q2 80 a 0 F3 F4 F5 F6 4 % 5 Λ 6 & 7 $ 4 #3 E R T Y D LL F G F7

Figure OV 0m ! 10 V 1m 20 V 2 m 30 V 3 m 40 V 4 m < 1 of 1 Part A What is the strength of the field at point 1 in (Figure 1). Express your answer with the appropriate units. E₁ = Submit Part B ▾ Part C HÅ Value Submit Request Answer HÅ E₂ = Value What is the strength of the field at point 2 in (Figure 1). Express your answer with the appropriate units. Units Request Answer B SAND ? Units ?

Consider two charge Q₁ = 1 x 10-6 [C] and Q₂ = 5 x 10-6 [C] separated by a distance r = 0.05 [m]. J What is the magnitude of the electric force between two charges? [N] a. F = b.₁ two charges is The electric force between the c. Suppose that the magnitude of the electric force between two charges is equal to: 27 [N]. What will be the magnitude of this force if the distance between the two charges is doubled while the charges are kept the same. F = [N] Repulsive Attractive

In the following problems, you don't need to understand the physics to complete the questions. Focus on the equations. (a) The force of gravity, F, between two masses, m and M, separated by a distance r, is given by where G is a constant. Write an equation of r in terms of other variables in the equation GmM F= 2 for F: r= (b) The electric force between two charges q=3·10¯6 units and Q=-4·10¯6 units separated by a distance, 1 d = 3-10-4 units, is given by F= where k=9. 10⁹ units. Without using a calculator, calculate the F. F= kq x² (c) Two positive electric charges, q and Q are separated by a distance d. Assume that q> Q> 0. The position x from charge q where the electric field zero is given by: = kQ (d-x)² kqQ d² Solve for x in terms of the other variables. The quantity k is a constant. Solution 1 represents the largest value of x. Hint: The solution can be simplified in many ways. The solutions accepted below have a form d Solution 1 = a-b Solution 2 = d a+b√√ You need to figure out…