The average 8-18 year old spends how many hours per day average in front of a screen doing little physical activity

How have the competing explanations' experiments on atoms affected the development of the atomic model?

Which statement best describes copper? a. it has a low resistance and prevents charges from moving freely. b it has a high resistance and allows charges to move freely. c. it has a high resistance and prevents charges from moving freely. d. it has a low resistance and allows charges to move freely

Explain earth's motion, using the terms "precession" and "rotation" in your answer.