A) a mass spectrometer has a velocity selector that allows ions traveling at only one speed to pass with no deflection through slits at the ends. while moving through the velocity selector, the ions pass through a 60,000-n/c e? field and a 0.0500-t b? field. the quantities v? , e? , and b? are mutually perpendicular. determine the speed of the ions that are not deflected. b) after leaving the velocity selector, the ions continue to move in the 0.0500-t magnetic field. determine the radius of curvature of a singly charged lithium ion, whose mass is 1.16