Emily has a class assignment to study conservation of energy and collisions she starts with two golf balls that hang from strings and hit each other when they swing explain how Emily's is the two golf balls that collide

Answer

its the force of gravity

Explanation:

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the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.