A moon orbits a planet along an elliptical path. Which describes the location of the planet within the ellipse

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?

While carrying a heavy box up the stairs, you set the box on a step and rest. then you pick up the box and carry it to the top of the stairs. describe these actions in terms of balanced and unbalanced forces acting on the box.