QQuestionPhysics
QuestionPhysics
Which of the following is an example of cohesion?
A. water transforming into vapor
B. water soaking into a paper towel
C. water slowly dissolving rocks over time
D. water forming droplets during a rainstorm
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Answer
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Step 1:Let me solve this problem step by step:
Step 2:: Understanding Cohesion
Cohesion is the attractive force between molecules of the same substance. It occurs when identical molecules are attracted to each other due to intermolecular forces.
Step 3:: Analyzing the Options
A. Water transforming into vapor - This is a phase change, not cohesion B. Water soaking into a paper towel - This involves adhesion (attraction between different molecules) C. Water slowly dissolving rocks over time - This is a chemical interaction, not cohesion D. Water forming droplets during a rainstorm - This demonstrates cohesion
Step 4:: Explanation of Cohesion in Option D
When water forms droplets, water molecules are attracted to each other, causing them to stick together and form a spherical shape. This is a classic example of cohesion, where the hydrogen bonds between water molecules create surface tension and allow droplets to form.
Step 5:: Reasoning
The key characteristic of cohesion is molecules of the same substance being attracted to each other, which is precisely what happens when water droplets form.
Final Answer
Water forming droplets during a rainstorm is the best example of cohesion.
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