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A 116 g Frisbee is 28 cm in diameter and has about half its mass spread uniformly in a disk, and the other half concentrated in the rim. With a quarter-turn flick of the wrist, a student sets the Frisbee rotating at 550 rpm.
(a) What is the rotational inertia of the Frisbee?
kg·m2
(b) What is the magnitude of the torque, assumed constant, that the student applies?
N·m
One electron collides elastically with a second electron initially at rest. After the collision, the radii of their trajectories are 1.50 cm and 2.90 cm, Determine the energy (in keV) of the incident electron
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