What is the potential difference between a point at radius r and the surface of the cylinder? Give your answer in terms of the variables A, r, and R. Combine all numerical values together into one numerical multiplier. ? x" Xb X•10" AV =

Speed of an Electron between Two Charges Two stationary positive point charges, charge 1 of magnitude 3.60 nC and charge 2 of magnitude 1.60 nC, are separated by a distance of 41.0 cm. An electron is released from rest at the point midway between the two charges, and it moves along the line connecting the two charges. Part A What is the speed Ufinal of the electron when it is 10.0 cm from charge 1? Express your answer in meters per second. ▸ View Available Hint(s) Ufinal = Submit Provide Feedback ΜΕ ΑΣΦ 跖 ? m/s Review IC

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Part A What is the electric potential at this point? At one point in space, the electric potential energy of a 15 nC charge is 51 µJ. Express your answer with the appropriate units. НА V = Value Units 9 This unit is not recognized. See the list of acceptable units. No credit lost. Try again. Submit Previous Ansswers Request Answer Part B If a 25 nC charge were placed at this point, what would its electric potential energy b Express your answer with the appropriate units. U = Value Units Submit Request Answer

Part A Two electrons are in the vicinity of a proton. The potential energy of the proton is -2.40x10-25 J. What is the potential at the proton's position? Express your answer with the appropriate units. Vp = = -1.50x10-6 V Submit Previous Answers Part B Correct If one of the electrons is 1.0 cm from the proton, what is the distance of the second electron from the proton? Express your answer with the appropriate units. T2 1.06x10-3 m Submit Previous Answers VP 18.3.2 Correct Part C V = Two protons are held fixed on the x axis at x = +1 m and x = -1 m. A third proton is placed at the origin and then given a gentle nudge in the +y direction. Derive an expression for the speed of this proton as a function of its position on the y axis. Assume that it starts from rest and neglect gravity. Express your answer in terms of e, k, mp, and y. VE ΑΣΦ ?

Two 11.0-cm-diameter electrodes 0.75 cm apart form a parallel-plate capacitor. The electrodes are attached by metal wires to the terminals of a 14 V battery. Part A What is the charge on each electrode while the capacitor is attached to the battery? Enter your answers separated by a comma. Express each answer using three significant figures. ▸ View Available Hint(s) 195) ΑΣΦΑ Q₁, Q₂ = Submit Part B Submit What is the electric field strength inside the capacitor while the capacitor is attached to the battery? Express your answer using three significant figures.. ▸ View Available Hint(s) 195] ΑΣΦΑ ? ? C V/m

IP A parallel-plate capacitor filled with air has plates of area 6.6x10-3³ m² and a separation of 0.36 mm. Part A Find the magnitude of the charge on each plate when the capacitor is connected to a 12-V battery. Express your answer using two significant figures. Q= Submit Part B Submit O Increase O Decrease O Stay the same 17| ΑΣΦ | Will your answer to part A increase, decrease, or stay the same if the separation between the plates is increased? Part D Request Answer Part C Complete previous part(s) Q = Submit Request Answer www. ? Calculate the magnitude of the charge on the plates if the separation is 0.83 mm. Express your answer using two significant figures. IV—| ΑΣΦ 3 Request Answer nC ? nC

A uniform electric field of magnitude 7.8x105 N/C points in the positive z direction. Part A Find the change in electric potential energy of a 8.0-μC charge as it moves from the origin to the point (0, 6.0 m). Express your answer using one significant figure. IVE] ΑΣΦ AU = Submit Part B AU = Find the change in electric potential energy of a 8.0-μC charge as it moves from the origin to the point (6.0 m, 0). Express your answer using two significant figures. IVE] ΑΣΦ Submit Part C Request Answer AU = Submit Request Answer w ? Find the change in electric potential energy of a 8.0-μC charge as it moves from the origin to the point (6.0 m, 6.0 m). Express your answer using two significant figures. [5] ΑΣΦ Request Answer ? w ? J J J

I know that part a is 0 V.  I tried 3.54x10^6 V for part b but that is incorrect.

Part A The work done by an external force to move a -5.60 µC charge from point A to point B is 1.50x10-3 J. If the charge was started from rest and had 4.72x10-4 J of kinetic energy when it reached point B, what must be the potential difference between A and B? Express your answer with the appropriate units. HẢ ? VB – VA = Value Units