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Surface Tension Quiz

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Questions and Answers

What causes the molecule B to experience a net resultant force in the downward direction?

Resultant force acting in the upward direction

Equal forces from surrounding molecules

Absence of forces from surrounding molecules

Upward and downward unbalanced forces near the free surface (correct)

How is the molecule A affected by the surrounding molecules of the liquid?

Attracted equally in all directions (correct)

Attracted only in the downward direction

Repelled in all directions

No interaction with surrounding molecules

What is the behavior of the molecules on the free surface of the liquid?

Experience a resultant downward force (correct)

Experience a resultant upward force

Experience no resultant force

Experience equal forces in all directions

How does the free surface of the liquid act, according to the explanation?

Acts like a very thin film under tension Signup and view all the answers

Explain the phenomenon of surface tension as described in the text.

The phenomenon of surface tension is explained by the unbalanced forces acting on molecules near the free surface of a liquid, causing a net resultant force in the downward direction. Signup and view all the answers

What is the role of molecule A in the explanation of surface tension?

Molecule A is used to illustrate that it experiences equal forces in all directions from surrounding molecules, resulting in a zero net resultant force. Signup and view all the answers

How do molecules on the free surface of the liquid behave?

Molecules on the free surface of the liquid experience a net resultant force in the downward direction, similar to a very thin film under tension. Signup and view all the answers

What comparison is made to describe the behavior of the free surface of the liquid?

The free surface of the liquid is compared to a very thin film under tension, where the molecules act as though it is an elastic membrane under tension. Signup and view all the answers