Motion (physics) In physics, motion is a change in position of an object over time. Motion is described in terms of displacement, distance, velocity, acceleration, time and speed. Motion of a body is observed by attaching a frame of reference to an observer and measuring the change in position of the body relative to that frame.
ADHD, medication rates in U.S. continue to rise. Attention deficit hyperactivity disorder (ADHD) rates in the United States continue to rise, with 11 percent of children ages 4-17 having received a diagnosis in 2011, according to a study released Friday.
ADHD stands for Attention Deficit Hyperactivity Disorder (although I think the âDâ simply means Difference!). ADHD is not the result of brain damage and it doesnât mean you are dumb. Often, but not always, it is inherited from a parent or close relative. ADHD is a neurobiochemical condition resulting from a malfunction in the transmitter system of the brain.