# Pressure Studies 1.6 Tank A B C&D

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Phase 1

Initially Valves A, B, and E are closed.

Tank A and B are separated and each sealed from the atmosphere.

Tank A initially has 3' of air @ 40 psi

Tank C and Tank B initially contain air @ 32.476 psi

Pipe K is 12" id; initial air pressure is 32.476 psi

Phase 2

Valves A, B and E are opened.

**Combined pressures allow Tank C to fill with water pushing all Air into Tube B

Valves A, B and E are closed.

**As a conclusion, the final height of the water column after filling the tank C will get lower by approximately 0.076 m.

**It follows that the final pressure of the air above the water in the tank A will be: 2.529 bar

**The final height of the air room will be .99m

Phase 3

Tank D (with Unlimited depth and width) surrounds Tank A and B with water. During Phase 1 and phase 2 , Valve C is closed.

Valve C is opened.

PROBLEM:

How does the air and water change in Tank A?

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##### Solution Summary

The initial valves separated for each sealed atmosphere is examined

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Please see attachment.

Phase 1

Initially Valves A, B, and E are closed.

Tank A and B are separated and each sealed from the atmosphere.

Tank A initially has 3' of air @ 40 psi

Tank C and Tank B initially contain air @ 32.476 psi

Pipe K is 12" id; initial air pressure is 32.476 psi

Phase 2

Valves A, B and E are opened.

**Combined pressures allow Tank C to fill with water pushing all Air into Tube B

Valves A, B and E are closed.

**As a conclusion, the final height of the water column after filling the tank C will get lower by approx. 0.076 m.

**It follows that the final pressure of the air above the water in the tank A will be: 2.529 bar

**The final height of the air room will be ...

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