A sound wave enters a new medium where sound travels faster. How does this affect the frequency and wavelength of the sound? OA The frequency increases and the wavelength decreases.
OB. The frequency decreases and the wavelength increases.
Ос. . The frequency stays the same and the wavelength increases.
OD. The frequency stays the same and the wavelength decreases.
O E. Neither the frequency nor the wavelength is affected.

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?