1. What is Pressure in Liquid Droplet?

The pressure inside a liquid droplet is the excess pressure due to surface tension. It represents the additional pressure inside the droplet compared to the outside pressure, caused by the curvature of the liquid surface.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{excess} \) — Excess pressure inside the droplet (Pa)
• \( \sigma \) — Surface tension (N/m)
• \( d \) — Diameter of the droplet (m)

Explanation: The formula shows that excess pressure is inversely proportional to the diameter of the droplet and directly proportional to the surface tension of the liquid.

3. Importance of Pressure Calculation

Details: Calculating pressure in liquid droplets is crucial for understanding phenomena in fluid mechanics, aerosol science, and various industrial processes involving droplets and bubbles.

4. Using the Calculator

Tips: Enter surface tension in N/m and diameter in meters. Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: Why is there excess pressure inside a liquid droplet?
A: The excess pressure is due to surface tension, which causes the liquid surface to contract and creates additional pressure inside the droplet.

Q2: How does droplet size affect the internal pressure?
A: Smaller droplets have higher internal pressure due to greater curvature, while larger droplets have lower internal pressure.

Q3: What factors affect surface tension?
A: Surface tension depends on the liquid type, temperature, and presence of surfactants or impurities.

Q4: Is this formula applicable to all types of droplets?
A: This formula applies to spherical droplets. For non-spherical droplets or in the presence of external forces, more complex calculations are needed.

Q5: What are typical values for surface tension?
A: Water at 20°C has a surface tension of about 0.072 N/m, while mercury has about 0.465 N/m. Surface tension decreases with increasing temperature.