Rosa fills a graduated cylinder with 100 milliliters of Liquid X. She fills another graduated cylinder with 100 milliliters of Liquid Y. Then, at the same time and from the same height, she drops a marble into each liquid. The marble hits the bottom of the cylinder containing Liquid Y first.
Which best explains this result?
Liquid X is more viscous than Liquid Y.
Liquid Y is more viscous than Liquid X.
Liquid X’s atoms have weaker attractive forces.
Liquid Y’s atoms have stronger attractive forces.
The answer is:
Liquid Y is more viscous than Liquid X.
Viscosity is the measure of a fluid's resistance to flow. A more viscous fluid has a higher resistance to flow, meaning it is thicker and takes longer for objects to move through it. Since the marble hits the bottom of the cylinder containing Liquid Y first, it suggests that Liquid Y is more viscous than Liquid X.