If a needle is carefully placed on the surface of water, it floats due to:

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Question: If a needle is carefully placed on the surface of water, it floats due to:

Options:

Correct Answer: Surface tension

Solution:

The needle floats because the surface tension of water creates a force that counteracts the weight of the needle.

If a needle is carefully placed on the surface of water, it floats due to:

If a needle is carefully placed on the surface of water, it floats due to:

Step 1: Understand that water has a property called surface tension, which is like a 'skin' on the surface of the water.
Step 2: Recognize that this surface tension is caused by water molecules sticking together tightly.
Step 3: When you place a needle on the water, it doesn't sink because the surface tension pushes up against the needle.
Step 4: The upward force from the surface tension is strong enough to counteract the downward force of the needle's weight.
Step 5: As a result, the needle floats on the surface of the water.

Surface Tension – Surface tension is the cohesive force between liquid molecules at the surface, allowing objects denser than the liquid to float if they do not break the surface.