1. What is Surface Tension?

Surface Tension is a physical property of liquids where the surface behaves like an elastic membrane. It is caused by the cohesive forces between liquid molecules and is measured in Newton per meter (N/m).

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \sigma \) — Surface Tension (N/m)
• \( p_i \) — Internal Pressure Intensity (Pascal)
• \( r_t \) — Radius of Tube (Meter)

Explanation: This formula calculates the surface tension in a soap bubble based on the internal pressure intensity and the radius of the tube.

3. Importance of Surface Tension Calculation

Details: Surface tension calculation is important in various fields including fluid mechanics, material science, and biological systems. It helps in understanding the behavior of liquids at interfaces.

4. Using the Calculator

Tips: Enter internal pressure intensity in Pascal and radius of tube in meters. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What factors affect surface tension?
A: Surface tension is affected by temperature, the nature of the liquid, and the presence of impurities or surfactants.

Q2: How is surface tension measured experimentally?
A: Common methods include the capillary rise method, drop weight method, and Wilhelmy plate method.

Q3: Why is surface tension important in soap bubbles?
A: Surface tension creates the spherical shape of soap bubbles and determines their stability and behavior.

Q4: Can surface tension be negative?
A: No, surface tension is always a positive quantity as it represents the energy required to increase the surface area.

Q5: How does temperature affect surface tension?
A: Surface tension generally decreases with increasing temperature as molecular kinetic energy increases.