Author Question: A proton of mass M rotates with an angular speed of 2 106 rad/s in a circle of radius 0.80 m in a ... (Read 45 times)

scienceeasy · **on:** Jul 27, 2018

A proton of mass M rotates with an angular speed of 2 106 rad/s in a circle of radius 0.80 m in a cyclotron. What is the orbital angular momentum of the proton? (M = 1.67 10-27 kg)

A) 2.1 10-21 N-m-s
B) 1.1 10-20 N-m-s
C) 2.9 10-21 N-m-s
D) 5.3 10-21 N-m-s
E) 3.9 10-21 N-m-s

Question 2

Suppose you were to try to create a proton-antiproton pair by annihilation of a very high energy photon. The proton and the anti-proton have the same masses, but opposite charges. What energy photon would be required?

A) 1.022 MeV
B) 223. MeV
C) 1.88 GeV
D) 940. MeV
E) 0.47 GeV