1. What is Water Density?

Water density is a measure of mass per unit volume, typically expressed in kilograms per cubic meter (kg/m³). At 4°C, pure water has a density of exactly 1000 kg/m³.

2. How Does the Calculator Work?

The calculator uses the density equation:

Where:

• \( \rho \) — Density (kg/m³)
• \( m \) — Mass (kg)
• \( V \) — Volume (m³)

Explanation: The equation calculates how much mass is contained in a given volume of water.

3. Importance of Density Calculation

Details: Density calculations are essential in fluid mechanics, hydrology, and various engineering applications. It helps determine buoyancy, purity of water samples, and is used in quality control processes.

4. Using the Calculator

Tips: Enter mass in kilograms and volume in cubic meters. Both values must be positive numbers. For accurate results, measure mass and volume at the same temperature.

5. Frequently Asked Questions (FAQ)

Q1: Why does water density change with temperature?
A: Water density is temperature-dependent because water molecules move differently at different temperatures, affecting how closely they pack together.

Q2: What is the density of ice compared to liquid water?
A: Ice is less dense than liquid water (about 917 kg/m³), which is why ice floats on water.

Q3: How does salinity affect water density?
A: Adding salt increases water density because dissolved salts add mass without significantly increasing volume.

Q4: What are typical density values for pure water?
A: Pure water at 4°C has density of 1000 kg/m³, at 20°C it's about 998 kg/m³, and at 100°C it's approximately 958 kg/m³.

Q5: Why is density important in environmental studies?
A: Density differences drive ocean currents and affect how pollutants disperse in water bodies.