Question:
Draught = 12 mm water column.
Density of water = 1000 kg/m\(^3\).
Find pressure difference in Pa (round to 1 decimal).
Draught = 12 mm water column.
Density of water = 1000 kg/m\(^3\).
Find pressure difference in Pa (round to 1 decimal).
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Draught pressure = water-column height × density × gravity.
Updated On: Dec 22, 2025
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Correct Answer: 117.1
Solution and Explanation
Convert height:
\[
h = 12\ \text{mm} = 0.012\ \text{m}
\]
Pressure:
\[
\Delta P = \rho g h
= 1000 \times 9.81 \times 0.012
= 117.72\ \text{Pa}
\]
Rounded:
\[
\boxed{117.7\ \text{Pa}}
\]
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