A ball is tossed straight up and then falls straight back down. During which portions of the motion does the ball's acceleration vector point upward?.

Distance^2= yellow line ^2 (see picture) = 30^2 + 49^2so distance = squareroot of (300^2 +49^2)i dont know if this is how to solve it, but i cnt think of another way

A. they hold atoms  together with a molecule.its a force that exist between molecules. hope this .

Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of  electromagnetic  energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.