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Water Pressure Equation:
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The water pressure equation (P = ρ × g × h) calculates the pressure exerted by a column of water in a gravity feed system. This fundamental physics principle is essential for designing water supply systems, irrigation systems, and hydraulic applications.
The calculator uses the water pressure equation:
Where:
Explanation: The equation calculates the hydrostatic pressure at the bottom of a water column, which increases linearly with both density and height of the water column.
Details: Accurate water pressure calculation is crucial for designing efficient water distribution systems, ensuring adequate water flow to endpoints, determining pipe specifications, and planning irrigation systems in agricultural applications.
Tips: Enter water density in kg/m³ (1000 for pure water), gravity in m/s² (9.81 at sea level), and height of water column in meters. All values must be positive numbers.
Q1: What is the typical density value for water?
A: Pure water at 4°C has a density of 1000 kg/m³. This value decreases slightly with increasing temperature.
Q2: Does this equation work for other liquids?
A: Yes, the equation works for any fluid. Simply use the appropriate density value for the specific liquid.
Q3: How does water pressure relate to water flow?
A: Higher water pressure typically results in greater water flow, though the relationship also depends on pipe diameter, length, and friction losses.
Q4: What are common units for water pressure?
A: Pascals (Pa) are the SI unit, but water pressure is also commonly measured in psi (pounds per square inch), bar, or meters of water column.
Q5: How does elevation affect gravity in the calculation?
A: Gravity decreases slightly with increasing elevation, but for most practical applications, the standard value of 9.81 m/s² is sufficiently accurate.