5. [-/10 Points] DETAILS SERCP11 16.1.P.007.MI. Oppositely charged parallel plates are separated by 4.85 mm. A potential difference of 600 V exists between the plates. (a) What is the magnitude of the electric field between the plates N/C (b) What is the magnitude of the force on an electron between the plates? c) How much work must be done on the electron to move it to the negative plate if it is initially positioned 2.24 mm from the positive plate? Need Help? Read It Master It 6. [-/10 Points] DETAILS SERCP11 16.2.P.021. A tiny sphere of mass 8.80 mg and charge -2.80 nC is initially at a distance of 1.44 um from a fixed charge of +7.89 nc. (a) If the 8.80-mg sphere is released from rest, find its kinetic energy when it is 0.500 um from the fixed charge. (b) If the 8.80-mg sphere is released from rest, find its speed when it is 0.500 um from the fixed charge. m/ Need Help? Read It 7. [-/5 Points] DETAILS SERCP11 16.2.P.023. In Rutherford's famous scattering experiments that led to the planetary model of the atom, alpha particles (having charges of +2e and masses of 6.64 x 10-27 kg) were fired toward a gold nucleus with charge +79e. An alpha particle, initially very far from the gold nucleus, is fired at 1.76 x 10 m/s directly toward the nucleus, as in the figure below. How close does the alpha particle get to the gold nucleus before turning around? Assume the gold nucle 7m Need Help? Read It Watch It 8. [-/10 Points] DETAILS SERCP11 16.2.P.015.MI. Two point charges Q, = +5.20 nC and Q, = -1.70 nC are separated by 55.0 cm. (a) What is the electric potential at a point midway between the charges? b) What is the potential energy of the pair of charges? What is the significance of the algebraic sign of your answer? Positive work must be done to separate the charges. Negative work must be done to separate the charges. Need Help? Read it Master It