The surface tension of a liquid is to be measured using a liquid film suspended on a
Question:
The surface tension of a liquid is to be measured using a liquid film suspended on a U-shaped wire frame with an 8 cm-long movable side. If the force needed to move the wire is 0.030 N, determine the surface tension of this liquid in air.
Step by Step Answer:
The force acting on the movable wire of a liquid film suspe...View the full answer
Fluid Mechanics Fundamentals And Applications
ISBN: 9781259696534
4th Edition
Authors: Yunus Cengel, John Cimbala
Related Video
The property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of its molecules. The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension. The molecules at the surface of a glass of water do not have other water molecules on all sides of them and consequently, they cohere more strongly to those directly associated with them (in this case, next to and below them, but not above). is not really true that a \\\"skin\\\" forms on the water surface; the stronger cohesion between the water molecules as opposed to the attraction of the water molecules to the air makes it more difficult to move an object through the surface than to move it when it is completely submersed
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