Could i get some help with this ? It would mean a lot. Thank you.

6. (Knight Problem 23.29) The surface charge density on an infinite charged plane is -2.0 x 10 * C/m'. A proton is shot straight away from the plane at 2.0 x 10" m/s. How far does the proton travel before reaching its turning point? [Answer: 0.18 m. 7. (Knight Problem 23.33) A point charge Q is distance r from a dipole consisting of charges 1q separated by distance s. The dipole is initially oriented so that Q is in the plane bi- secting the dipole. Immediately after the dipole is released, what are (a) the magnitude of the force and (b) the magni- tude of the torque on the dipole? You can assume " 5. [Answer: (a) 1 (b) 18. (Knight Problem 23.41) FIGURE P23.41 is a cross section of two infinite lines of charge that extend out of the page. Both have linear charge density A. Find an expression for the electric field strength E at height y above the midpoint between the lines. [Answer: A + + Lines of charge coming out of the page FIGURE P23.41 9. (Knight Problem 23.51) A parallel-plate capacitor has 2.0 cm x 2.0 cm electrodes with surface charge densities +1.0x10-6 C/m2. A proton traveling parallel to the electrodes at 1.0 x 10" m/s enters the center of the gap between them. By what distance has the proton been deflected sideways when it reaches the far edge of the capacitor? Assume the field is uniform inside the capacitor and zero outside the capacitor. [Answer: 2.2 mm.] 10. (Knight Problem 23.53) The two parallel plates in FIGURE P23.53 are 2.0 cm apart and the electric field strength be- tween them is 1.0 x 10* N/C. An electron is launched at a 45" angle from the positive plate. What is the maximum initial speed vo the electron can have without hitting the negative plate? [Answer: 1.19 x 10' m/s.] Vo 2.0 cm 450 +++++++++++ FIGURE P23.53