1/21/2014 HW 1http://www.webassign.net/web/Student/Assignment-Responses/view_key?dep=8334045 1/7Current Score : 25 / 26 Due : Tuesday, January 21 2014 02:30 PM EST1. 1/1 points | Previous Answers SerPSE8 23.QQ.001.Three objects are brought close to each other, two at a time. When objects A and B are broughttogether, they repel. When objects B and C are brought together, they also repel. Which of thefollowing are true? (Select all that apply.) 2. 2/2 points | Previous Answers SerPSE8 23.P.002.WI.(a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of9.0 g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mol.2.368E24 2.36e+24 (b) Imagine adding electrons to the pin until the negative charge has the very large value 2.00mC. How many electrons are added for every 109 electrons already present?5.2787 5.29 HW 1 (Homework)Tyler Bogard125112:40, Spring 2014Instructor: Sharvil DesaiWebAssignThe due date for this assignment is past. Your work can be viewed below, but no changes can be made. All three objects possess charges of the same sign.One object is neutral. Additional experiments must be performed to determine the signs of the charges. Objects A and C possess charges of the same sign.Objects A and C possess charges of opposite sign.1/21/2014 HW 1http://www.webassign.net/web/Student/Assignment-Responses/view_key?dep=8334045 2/73. 1/1 points | Previous Answers SerPSE8 23.P.003.A molecule of DNA (deoxyribonucleic acid) is 2.13 µm long. The ends of the molecule becomesingly ionized: negative on one end, positive on the other. The helical molecule acts like a springand compresses 1.26% upon becoming charged. Determine the effective spring constant of themolecule.1.9435E9 1.94e09 N/m 4. 6/6 points | Previous Answers SerPSE8 23.P.008.Three point charges lie along a straight line as shown in the figure below, where q1 = 5.82 µC,q2 = 1.45 µC, and q3 = 2.04 µC. The separation distances are d1 = 3.00 cm and d2 = 2.00 cm.Calculate the magnitude and direction of the net electric force on each of the charges.(a) q1magnitude 41.6 41.6 Ndirection to the left to the left(b) q2magnitude 150.77 151 Ndirection to the right to the right(c) q3magnitude 109.1756 109 Ndirection to the left to the left 5. 2/2 points | Previous Answers SerPSE8 23.P.013.MI.Three charged particles are located at the corners of an equilateral triangle as shown in the figure1/21/2014 HW 1http://www.webassign.net/web/Student/Assignment-Responses/view_key?dep=8334045 3/7below (let q = 1.20 µC, and L = 0.910 m). Calculate the total electric force on the 7.00µC charge.magnitude .27017 0.27 Ndirection 317 43 ° (counterclockwise from the +x axis)Master ItThree charged particles are located at the corners of an equilateral triangle as shown in the figurebelow (let q = 2.70 µC, and L = 0.580 m). Calculate the total electric force on the 7.00µC charge.Part 1 of 9 ConceptualizeThe 7.00µC charge experiences a repulsive force due to charge q and an attractive force due to the −4.00µC charge, where If we sketch vectors representing and and their sum (see diagram), we see that the resulting vector has a magnitude somewherebetween the magnitudes of the two vectors and a direction at an angle some tens of degreesbelow the horizontal.qF2FF2 = (4.00/q)F1.qF2F F1/21/2014 HW 1http://www.webassign.net/web/Student/Assignment-Responses/view_key?dep=8334045 4/7 6. 2/2 points | Previous Answers SerPSE8 23.P.062.Four identical charged particles (q = +10.5 µC) are located on the corners of a rectangle as shownin the figure below. The dimensions of the rectangle are L = 58.2 cm and W = 14.5 cm.(a) Calculate the magnitude of the total electric force exerted on the charge at the lowerleft corner by the other three charges.48.13 48.1 N(b) Calculate the direction of the total electric force exerted on the charge at the lowerleft corner by the other three charges.263.3 263 ° (counterclockwise from the +xaxis) 1/21/2014 HW 1http://www.webassign.net/web/Student/Assignment-Responses/view_key?dep=8334045 5/77. 1/1 points | Previous Answers SerPSE8 23.P.066.Three identical point charges, each of mass m = 0.400 kg, hang from three strings, as shown inthe figure below. If the lengths of the left and right strings are each L = 34.0 cm, and if the angleθ is 45°, determine the value of q.4.4825E6 4.49e06 C 8. 4/4 points | Previous AnswersTwo identical conducting small spheres are placed with their centers 0.295 m apart. One is given acharge of 36 nC and the other a charge of 19 nC.(a) Find the electric force exerted by one sphere on the other.magnitude 7.06596E5 7.07e05 Ndirection toward the other sphere
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