Figure shows schematic of a venturimeter. The cross sectional area is 100 mm² at A and is 50 mm² at B. If air is flowing through the venturimeter at a flow rate of 10⁻³ m³⋅s⁻¹, the height H in the air-over-water manometer is _______ mm (round off to the nearest integer).
Assume:
1. Incompressible flow with no friction losses.
2. Density of air is 1 kg⋅m⁻³.
3. Density of water is 1000 kg⋅m⁻³
4. Acceleration due to gravity is 9.8 m⋅s⁻².