Quick how are radioactive elements used for medical diagnosis? 1. the elements are placed in special cameras which record images from emitted radiation, like x-ray equipment. 2. some isotopes are absorbed in particular tissues and organs. 3. these radioactive isotopes act as tracers. the radiation from certain elements can penetrate the entire body and expose all internal organs to photographic film. 4. all of these.

The place you get your hair cut has two nearly parallel mirrors 6.00 m apart. as you sit in the chair, your head is 2.00 m from the nearer mirror. looking toward this mirror, you first see your face and then, farther away, the back of your head. (the mirrors need to be slightly nonparallel for you to be able to see the back of your head, but you can treat them as parallel in this problem.) how far away does the back of your head appear to be?

Velocity is a description of both speed and direction, therefore it - a vector - a force arrow - the same as acceleration - a magnitude

A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. assuming that there is no air resistance, which statement is true?