A bottle can collapse if there is a significant change in pressure inside the bottle compared to the pressure outside, causing the walls of the bottle to buckle inwards. This can happen if the bottle is not able to withstand the pressure differential, or if it is made of a weak material. Additionally, extreme temperatures or physical impacts can also cause a bottle to collapse.
Unopened water bottles collapse due to changes in air pressure. When the air pressure outside the bottle is higher than the pressure inside, the bottle can collapse as the external pressure pushes in on the bottle, causing it to shrink.
This answer presumes that "empty" means the bottle has no water in it, but does have air in it.In this case the bottle would collapse (or partly collapse) if the temperature inside the bottle dropped to a lower temperature causing the air inside to shrink, or if the bottle was taken to a place of higher air pressure (such as taking the bottle from a mountain peak to the base of the mountain.The bottle would also collapse at some point of evacuation if "empty" means the bottle was evacuated of water and air. The point of collapse, in this case, would depend on the physical construction of the bottle - ie, whether it was made of steel, plastic or glass
When the air is removed from a bottle, the external air pressure becomes greater than the pressure inside the bottle, causing the bottle to collapse. This is because the air pressure on the outside is strong enough to compress the bottle's walls, leading to its collapse without the internal pressure to counterbalance it.
If air particles are removed from a plastic bottle, the volume inside the bottle would decrease due to the absence of air pressure. The bottle may collapse or shrink in size as there is no longer any external pressure to counteract the elasticity of the bottle material.
When the bottle was placed in cold water, the air inside the bottle cooled down and contracted, causing the bubble to shrink or collapse. The decrease in temperature led to a decrease in the volume of air in the bottle, making the bubble appear smaller or disappear.
When air inside a bottle is heated, it expands and increases pressure. If the bottle cannot withstand this increased pressure, it will collapse as the hot air cools down and contracts, creating a vacuum. The difference in pressure between the inside and outside of the bottle causes it to collapse.
Unopened water bottles collapse due to changes in air pressure. When the air pressure outside the bottle is higher than the pressure inside, the bottle can collapse as the external pressure pushes in on the bottle, causing it to shrink.
When you crush a plastic bottle, you decrease the volume inside the bottle. This increase in pressure (due to the decrease in volume) is what makes the bottle crush. The atmospheric pressure outside the bottle remains constant, causing the bottle to collapse under the increased pressure inside.
When an empty water bottle is placed in a freezer, the air inside the bottle cools down and contracts, creating a lower pressure in the bottle compared to the external pressure. This pressure difference causes the bottle to collapse as the external pressure compresses the bottle inward.
This answer presumes that "empty" means the bottle has no water in it, but does have air in it.In this case the bottle would collapse (or partly collapse) if the temperature inside the bottle dropped to a lower temperature causing the air inside to shrink, or if the bottle was taken to a place of higher air pressure (such as taking the bottle from a mountain peak to the base of the mountain.The bottle would also collapse at some point of evacuation if "empty" means the bottle was evacuated of water and air. The point of collapse, in this case, would depend on the physical construction of the bottle - ie, whether it was made of steel, plastic or glass
When the air is removed from a bottle, the external air pressure becomes greater than the pressure inside the bottle, causing the bottle to collapse. This is because the air pressure on the outside is strong enough to compress the bottle's walls, leading to its collapse without the internal pressure to counterbalance it.
With less gas inside the bottle, it will weigh less. But not by very much, for the mass of the volume of air is slight. If he bottle is evacuated, then its shape will change slightly - but once again, a small amount. If the bottle is fragile, it may collapse. This would be expected for a plastic bottle, such as a soft drink bottle.
Gravity.
Actually, an empty sealed bottle should expand slightly as altitude increases. At the altitude where the bottle is sealed, the air pressure outside the bottle is equal to the air pressure inside the bottle. When the bottle is transported to a higher altitude, the air pressure inside the bottle is greater than the air pressure outside the bottle (In other words: There are more air molecules per unit volume inside the bottle than outside). The increased air pressure inside the bottle relative to the outside pressure causes the bottle to expand slightly. An empty bottle would not collapse as altitude increases.
a strong gravitational force which means that the star will collapse in on itself
the high mass star's core collapse because its gravity
Bottle