The drawing shows an equilateral triangle, each side of which has a length of 3.71 cm. Point charges are fixed to each corner, as shown. The 4.00 Ac charge experiences a net force due to the charges qA and q8. This net force points vertically downward and has a magnitude of 630 N. Determine (a) charge qA, (b) charge q8-

A molecule of DNA (deoxyribonucleic acid) is 2.08 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 0.81% upon becoming charged. Determine the effective spring constant of the molecule. N/m

The distance between two charges gl = +2uC and q3 - +6uC is 20cm. Calculate the distance from charge ql to the points on the line joining the two charges where q2 = +1µC does not move.

Determine the initial acceleration of the dust particle.

Suppose Q = 2 nC, like the other two charges. If the assembly of identical charges is released from rest, what kinetic energy will each charge have after they all fly apart to infinity? 1 cm, 2 nC (+ ( 2.4 u O 36uJ O 1.2uJ O72uJ + 60° 60% 60% 1 cm 1 cm +) 2 nC

A particle (charge 8.3 μC) is released from rest at a point on the x axis, x = 23 cm. It begins to move due to the presence of a 3.6-μC charge which remains fixed at the origin. What is the kinetic energy of the particle at the instant it passes the point x = 1.2 m?

Two equal charges are situated on the x axis at 40.0 cm on either side of the origin as shown in the figure below. Location A is on the perpendicular bisector at a distance of 21.0 cm from the origin on the y axis. (Assume that the +x axis is directed to the right and they axis is directed up.) 91 *A 92 (a) If q,- -3.50 C and q,- -3.50 C what is the net electric field due to both charges at location A? Express your answer in vector form. 1.64-10%) x Did you consider the symmetry of the situation? What is the net contribution to the field from the x components of the field from each charge? N/C (b) If a, 3a, (where q,- -3.50 pC), what is the net electric field at location A due to both charges? Express your answer in vector form -4.68-10%-4.1-10% x If the two charges are unequal, what is the net contribution to the field from each charge in the two perpendicular directions? N/C

A particle (charge = 6.1 μC) is released from rest at a point x = 19.3 cm. If a 78.1-μC charge is held fixed at the origin, what is the kinetic energy of the particle after it has moved 98.2 cm?

The velocity selector shown below allows a 2 µC charged particle to pass through without being deflected as long as its velocity is v = 5,500 m/sec. Which of the following statements are True/False? positive plate X X X X X X X X X X X X X ľo X negative plate X X X If v = 4,500 m/sec, a negative charge deflects left. True If v = 6,500 m/sec, a positive charge deflects right. | True If B is increased, all negative charges with v = 5,500 m/sec deflect left. False Any charged particle traveling at 5,500 m/sec passes through undeflected. True If E is increased, all positive charges with v = 5,500 m/sec deflect right. | True Note: you MUST complete all sentences before submitting.

The figure shows 2 charges q1= 1.5 MC and q2=2.3 MC separated by L=13 cm At what point x, E=0?