Calculate the magnitude of the particle accelerator's magnetic field that causes an ionized helium atom (+2q e) with a momentum of 4.8x1016kgxm/s to orbit in the horizontal plane with a 1.0km radius. +2]q el = 2(1.6xx10x10-19c) note: q alpha a. 0.50t ob. 1.0t oc. 1.5t d. 2.0t oe. 2.5t

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.