3. [-I1 Points] DETAILS SERCP11 15.2.P.006. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A molecule of DNA (deoxyribonucleic acid) is 2.24 um long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 1.18% upon becoming charged. Determine the effective spring constant of the molecule. N/m Need Help? _' Submit Answer 4. [-/6 Points] DETAILS SERCP11 15.2.P.010. MY NOTES ASK YOUR TEACHER Calculate the magnitude and direction of the Coulomb force on each of the three charges shown in the figure below. 6.00 MC 1.50 MC -2.00 MC + - 3.00 cm -2.00 cm - 6.00 JC charge magnitude N 6.00 JC charge direction ---Select--- C 1.50 JC charge magnitude N 1.50 JC charge direction ---Select--- -2.00 HC charge magnitude 2 -2.00 HC charge direction ---Select--- C Need Help? Read It Submit Answer5. [-/2 Points] DETAILS SERCP11 15.2.P.013. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Three point charges are located at the corners of an equilateral triangle as in the gure below. Find the magnitude and direction of the net electric force on the 1.20 uC charge. (Let A = 1.20 uC, B = 6.50 0C, and C = 4.04 pC.) ' B 0.500 m 600 x A C (D magnitude N direction below the +x-axis Need Help? _' Submit Answer 6. [-11 Points] DETAILS SERCP11 15.A.P.068. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Three identical point charges, each of mass m = 0.415 kg, hang from three strings, as shown in the figure below. If the lengths of the left and right strings are each L = 22.0 cm, and if the angle 9 is 45.0, determine the value of q. 6 /9 E L L +4 +'I +'I a a e m m m G) uC Need Help? _ Submit Answer 7. [-/4 Points] DETAILS SERCP11 15.3.P.024. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER CD (a) Three point charges, A = 1.75 uC, B = 6.70 uC, and C = 4.8() pc, are located at the corners of an equilateral triangle as in the gure above. Find the magnitude and direction of the electric eld at the position of the 1.75 uC charge. magnitude N/C direction below the +x-axis (b) How would the electric field at that point be affected if the charge there were doubled? The magnitude of the field would be halved. The field would be unchanged. The magnitude of the field would double. The magnitude of the field would quadruple. Would the magnitude of the electric force be affected? Yes No Need Help? Submit Answer 8. [-l1 Points] DETAILS SERCP11 15.3.P.031. MY NOTES ASK YOUR TEACHER In the figure below, determine the point (other than infinity) at which the total electric field is zero. mm-l 59 2.5 [AC 6.0 [AC (D m to the left of 2.5 x 10'6 C charge Need Help? _' Submit