"Patrick Reany" wrote in message
om...
I can not remember one time in any class I've taken in science and
even in physics (I took the entire undergraduate core of physics
classes at a major university) in which any of these terms were
defined clearly, if they were defined at all! If your experience was
different, let us know what are those definitions you read. Please
give the references too.

I can.

References: Mr. Griffin, 7th grade science, 1959. Dr. Hewlett, Physics
11, 1965.