In a nuclear reaction carbon nucleus, 12c collides elastically in a head-on collision with an unknown nucleus. the initial speed of the carbon nucleus is 110 km/h and the speed of the unknown nucleus is 400km/h. after the collision the carbon nucleus moves in opposite direction to its original direction with a speed of 145km/h. i) determine the ratio of the mass of carbon nucleus and the unknown nucleus. ii) what is the velocity of the unknown nucleus after the collision?

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c