1. A proton of mass rotates with an angular speed of 2*10^6 rad/s in a circle of radius 0.8m in a cyclotron. What is the orbital angular momentum of the proton? 2.An object's angular momentum changes by 10Kgm/s^2. What magnitude average torque acted on this object? 3. A pulsar which emits radio waves 642 times per second has a mass of 2*10^30 kg and has a radius of only 15km. a) What is the linear speed of a point on the equator of this pulsar? Ignore relativistic effects. b) If our sun, with mass 2*10^30 kg and radius 7*10^5 km had the same angular momentum as this pulsar, approximately what would its rotational period be? BTW, how do I upload an avatar to my profile? I tried in the CP but I didn't find any option that would allow me to do so.