For this system, point B is 10 m above the bottom of the upper reservoir. The head loss from A to B is 1.1V ²/2g, and the pipe area is 8 × 10^–4 m². Assume a constant discharge of 8 × 10^–4 m³/s. For these conditions, what will be the depth of water in the upper reservoir for which cavitation will begin at point B? Vapor pressure = 1.23 kPa and atmospheric pressure = 100 kPa. Assume α = 1.0 at all locations.

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B Discharge (submerged) into lower reservoir Water T= 20°C + D