At a particular instant a proton is at the origin, moving with velocity <3× 104. -9×104,-9 × 104> m/s. Part 1 * Your answer is incorrect. (a) At this instant, what is the electric field at location <8 x 10-3,8 × 10-3,5×10-³> m due to the proton? (Express your answer in vector form.) E = N/C Attempts: 1 of 10 used >T Submit Answer Attempts: 4 of 10 used Submit Answer

Part A Calculate the magnitude of the electric field at the center of a square 42.5 cm on a side if one corner is occupied by a -38.8 µC charge and the other three are occupied by -26.5 µC charges. Express your answer to three significant figures and include the appropriate units. HA ? E = Value Units Submit Request Answer Part B Choose the correct direction of the electric field at the center of the square. toward to –38.8 µC charge perpendicular to the diagonal passing through –38.8 µC charge outward of –38.8 µC charge

Part A An electron is moving east in a uniform electric field of 1.47 N/C directed to the west. At point A, the velocity of the electron is 4.46x105 m/s pointed toward the east. What is the speed of the electron when it reaches point B, which is a distance of 0.395 m east of point A? Express your answer in meters per second. V₁ = Submit Part B || ΑΣΦ ← Request Answer 给 ΑΣΦ A p=1.73.104 Ć A proton is moving in the uniform electric field of part A. At point A, the velocity of the proton is 1.92x10 m/s, again pointed towards the east. What is the speed of the proton at point B? Express your answer in meters per second. C 16 ? Submit Previous Answers Request Answer ? m/s * Incorrect; Try Again; 29 attempts remaining m/s

Part A The electric flux is 300 Nm? /C through two opposing faces of a 2.0 cm x 2.0 cm x 2.0 cm box. The flux through each of the other faces is 200 Nm? /C. How much charge is inside the box? Express your answer to two significant figures and include the appropriate units. HA ? q = Value Units Submit Request Answer Provide Feedback