1. What is Gauge Pressure?

Gauge pressure is the pressure relative to atmospheric pressure. In fluid mechanics, it represents the pressure at a specific depth in a fluid, calculated using the formula P_g = ρgh, where ρ is fluid density, g is gravitational acceleration, and h is depth.

2. How Does the Calculator Work?

The calculator uses the gauge pressure formula:

Where:

• \( P_g \) — Gauge pressure (Pascals)
• \( \rho \) — Fluid density (kg/m³)
• \( g \) — Gravitational acceleration (m/s²)
• \( h \) — Depth below surface (m), fixed at 10m

Explanation: This formula calculates the additional pressure experienced at a depth of 10 meters in a fluid due to the weight of the fluid above that point.

3. Importance of Pressure Calculation

Details: Accurate pressure calculation is crucial for underwater engineering, diving safety, marine research, and understanding fluid behavior in various applications.

4. Using the Calculator

Tips: Enter fluid density in kg/m³ (seawater ≈ 1025 kg/m³) and gravitational acceleration in m/s² (Earth ≈ 9.81 m/s²). Depth is fixed at 10 meters for ocean depth calculation.

5. Frequently Asked Questions (FAQ)

Q1: Why is depth fixed at 10 meters?
A: This calculator specifically calculates pressure at a standard ocean depth of 10 meters for consistent comparative analysis.

Q2: What is typical seawater density?
A: Seawater density typically ranges from 1020-1030 kg/m³, depending on salinity and temperature conditions.

Q3: How does pressure change with depth?
A: Pressure increases linearly with depth - for every 10 meters of depth, pressure increases by approximately 1 atmosphere (101.325 kPa).

Q4: What's the difference between gauge and absolute pressure?
A: Gauge pressure measures pressure above atmospheric, while absolute pressure includes atmospheric pressure (P_abs = P_g + P_atm).

Q5: Why is this calculation important for divers?
A: Understanding pressure at depth is essential for dive planning, decompression calculations, and ensuring diver safety.