no it gets trapped in there. Once the tank is displaced with water it will stay there unless something can take its place. Being that the tank is a sealed chamber it stays suspended in the tank. Its the same science behind the old upside down cup in the kitchen sink. Fill the sink and turn a cup sideways till it is full of water. Then turn it upside down and pull the cup. Presto the water is suspended in the glass. Same idea here.
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