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What is the unit of surface tension?

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Question: What is the unit of surface tension?

Options:

  1. N/m
  2. J/m²
  3. Pa
  4. N

Correct Answer: N/m

Solution: 

Surface tension is defined as force per unit length, hence its unit is Newton per meter (N/m).

What is the unit of surface tension?

Practice Questions

Q1
What is the unit of surface tension?
  1. N/m
  2. J/m²
  3. Pa
  4. N

Questions & Step-by-Step Solutions

What is the unit of surface tension?
Correct Answer: Newton per meter (N/m)
  • Step 1: Understand what surface tension is. It is a property of liquids that makes their surface behave like a stretched elastic membrane.
  • Step 2: Know that surface tension is caused by the forces between the molecules at the surface of a liquid.
  • Step 3: Realize that surface tension can be measured as the force acting along the surface of the liquid.
  • Step 4: Remember that force is measured in Newtons (N) and length is measured in meters (m).
  • Step 5: Since surface tension is force per unit length, we can express it as Newtons divided by meters.
  • Step 6: Therefore, the unit of surface tension is Newton per meter (N/m).
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