1. What is Density?

Density is a measure of mass per unit volume. In fluid mechanics, density (ρ) can be calculated from specific weight (γ) by dividing by the acceleration due to gravity (g). For gases, temperature significantly affects density.

2. How Does the Calculator Work?

The calculator uses the fundamental formula:

Where:

• \( \rho \) — Density (kg/m³)
• \( \gamma \) — Specific Weight (N/m³)
• \( g \) — Acceleration due to gravity (9.81 m/s²)

For gases: The calculator applies temperature correction using the ideal gas law approximation when temperature is provided.

3. Importance of Density Calculation

Details: Density is fundamental in fluid mechanics, buoyancy calculations, and many engineering applications. Accurate density values are crucial for proper system design and analysis.

4. Using the Calculator

Tips: Enter specific weight in N/m³. For gases, provide temperature for more accurate results. Select the appropriate substance type (liquid or gas).

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between density and specific weight?
A: Density is mass per unit volume (kg/m³), while specific weight is weight per unit volume (N/m³). They're related by gravity.

Q2: Why does temperature affect gas density?
A: According to the ideal gas law, gas density decreases with increasing temperature at constant pressure.

Q3: What's the typical density of water?
A: Pure water at 4°C has a density of about 1000 kg/m³ (specific weight of 9810 N/m³).

Q4: How accurate is this calculation for gases?
A: The basic formula is accurate for liquids. For gases, it's simplified - real gases may require more complex equations.

Q5: Can I use this for any substance?
A: The basic formula works for all substances, but temperature effects vary significantly between materials.