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Impermeable Rock
Air is matter - even if you can't see it. IF the glass were truly empty (a vacuum) the water would enter (and fill) the glass.
When an inverted mug is put in a bucket of water it is not empty. It has air in it. When the mug is tilted the air escapes to the surface, this air is the bubbles you refer to.
a vacuum.
Venus
A glass jar filled with air
Impermeable Rock
Impermeable Rock
Impermeable Rock
air or water
The air pressure is the same inside as outside the can.
because of the density and cold air
One way to form a Nitrogen blanket below air is to fill an empty vessel with it. As the vessel fills with nitrogen, the atmosphere or air is purged from the vessel.
Air is matter - even if you can't see it. IF the glass were truly empty (a vacuum) the water would enter (and fill) the glass.
Water cannot fill the glass because the glass is already ~lled with air. The "empty" glass is full of air. So, air takes up space. Air is a gas. It has no size or shape of its own but will fill every space it can.
The empty soda can is not sealed so air is free to enter and leave the can. As a result, pressure inside the can is the same as it is outside.
To fill with air is to inflate