What is the first thing you should do as a coach when one of your students has sustained a bump or blow to the head or body and isn’t acting right?Immediately rush a student to the hospital. Allow the student to finish out the quarter/period/half, etc. and then take the student for a medical examination. Remove the student from play and look for signs and symptoms of a concussion

Cyclotrons are widely used in nuclear medicine for producing short-lived radioactive isotopes. these cyclotrons typically accelerate h- (the hydride ion, which has one proton and two electrons) to an energy of 5 mev to 20 mev. this ion has a mass very close to that of a proton because the electron mass is negligible—about 1 2000 of the proton’s mass. a typical magnetic field in such cyclotrons is 1.9 t. (a) what is the speed of a 5.0-mev h-? (b) if the h- has energy 5.0 mev and b = 1.9 t, what is the radius of this ion’s circular orbit?