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What is the primary cause of surface tension in liquids?
What is the primary cause of surface tension in liquids?
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What is the primary cause of surface tension in liquids?
Cohesive forces
Adhesive forces
Gravitational forces
Electromagnetic forces
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Surface tension is primarily caused by cohesive forces between liquid molecules, which create a 'skin' at the surface.
Questions & Step-by-step Solutions
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Q: What is the primary cause of surface tension in liquids?
Solution:
Surface tension is primarily caused by cohesive forces between liquid molecules, which create a 'skin' at the surface.
Steps: 5
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Step 1: Understand that liquids are made up of tiny particles called molecules.
Step 2: Know that these molecules are attracted to each other. This attraction is called cohesive forces.
Step 3: Realize that molecules in the middle of the liquid are surrounded by other molecules, so they are pulled equally in all directions.
Step 4: Notice that molecules at the surface do not have other molecules above them, so they are pulled more strongly towards the liquid below.
Step 5: This unequal pulling creates a 'skin' or tension at the surface of the liquid, which we call surface tension.
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