Question

Draught = 12 mm water column. Density of water = 1000 kg/m\(^3\). Find pressure difference in Pa (round to 1 decimal).

Hint:

Draught pressure = water-column height × density × gravity.

Answer 1

Correct Answer: 117.1

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: \[ \boxed{117.7\ \text{Pa}} \]