Question

there is closed tube half filled with water and remaning portion is vaccum then what happen?

Answer 1

You have a bottle half with water and half with air. The environment is a vacuum that the bottle is in. The environment does have gravity.

So if we flipped the bottle so that the bottom of the bottle was facing up and the top of the bottle was facing down. If you open the bottle cap to try and remove the water, what would happen?

The aim is to know if the air in the bottle would expand (thus holding the bottles shape) or if the air would remain the same amount and just crunch the bottle; assuming that the water does come out.