A person walks 150 meters due east and then walks 30 meters due west. The entire trip takes the person 10 minutes. What is the person’s speed? A. 0.3 m/s B. 18 m/s C. 180 m/s D. 1800 m/s

If you want to change the pitch of a sound, you have to change the

Which statement best explains why an object weight less on mercury than it does on earth

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?