Attempting to learn more about the physiological aspects of depression, dr. paul observes levels and areas of brain activation in equal numbers of male and female subjects as they are viewing images of people exhibiting angry, sad, and fearful facial expressions. what is dr. paul most likely to observe? a. chances are better that 2 to 1 that the subject is male if brain activation levels are significantly suppressed. b. brain activation is markedly less in subjects diagnosed with depression. c. brain activation is significantly greater in subjects diagnosed with depression. d. chances are better that 2 to 1 that the subject is female if brain activation is significantly less than normal.

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.