questions: a study group of students is reviewing claims in an article that gamma rays are among the most dangerous type of electromagnetic radiation, because of the high energy of the waves. how should the students decide if this claim is reliable? (2 points)
options:
they should look at what country the study was done in.
they should see if there are any sources of bias.
they should vote on it.
they should create an online poll.

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?