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Which phenomenon explains why a needle can float on water despite being denser?
Which phenomenon explains why a needle can float on water despite being denser?
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Practice Questions
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Q1
Which phenomenon explains why a needle can float on water despite being denser?
Buoyancy
Surface tension
Viscosity
Capillarity
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Surface tension allows the needle to float on water, as it creates a 'skin' on the surface that can support the weight of the needle.
Questions & Step-by-step Solutions
1 item
Q
Q: Which phenomenon explains why a needle can float on water despite being denser?
Solution:
Surface tension allows the needle to float on water, as it creates a 'skin' on the surface that can support the weight of the needle.
Steps: 5
Show Steps
Step 1: Understand that density is a measure of how heavy something is for its size. A needle is denser than water.
Step 2: Learn about surface tension, which is a property of liquids that makes their surface behave like a stretched elastic sheet.
Step 3: Realize that when a needle is placed gently on the water, it does not break the surface tension.
Step 4: Notice that the surface tension creates a 'skin' on the water's surface that can support light objects.
Step 5: Conclude that the needle floats because the surface tension of the water is strong enough to hold it up, despite the needle being denser.
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