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Unit Weight of Water is the weight per unit volume of water, typically measured in Newton per Cubic Meter (N/m³). It is a fundamental property used in geotechnical engineering and soil mechanics calculations.
The calculator uses the formula:
Where:
Explanation: This formula calculates the unit weight of water based on the unit weight of soil solids and the specific gravity of the soil.
Details: Accurate calculation of unit weight of water is crucial for determining submerged unit weights, analyzing soil stability, and designing foundations and earth structures in geotechnical engineering.
Tips: Enter the unit weight of solids in N/m³ and the specific gravity of soil (dimensionless). Both values must be positive numbers greater than zero.
Q1: What is the typical value of unit weight of water?
A: The unit weight of water is approximately 9810 N/m³ (or 9.81 kN/m³) at standard conditions (4°C).
Q2: How does specific gravity affect the calculation?
A: Specific gravity represents the density ratio of soil solids to water. Higher specific gravity values result in lower calculated unit weight of water for the same unit weight of solids.
Q3: When is this calculation particularly important?
A: This calculation is essential when determining submerged unit weights of soil for underwater construction, dam design, and foundation analysis below water tables.
Q4: Are there limitations to this formula?
A: The formula assumes standard temperature conditions and may need adjustment for extreme temperatures where water density changes significantly.
Q5: Can this be used for other fluids besides water?
A: The formula is specifically derived for water. For other fluids, different relationships and specific gravity references would be needed.