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Alkalis expand and soften the hair shaft.
The bottle will expand and overflow.
Heat causes materials to expand. Hopefully, the bottle top will expand more rapidly than the bottle and therefore the top will not adhere so tightly to the bottle and it can more easily be unscrewed.
when liquids freeze they expand so if you freeze anything in a full can or bottle it will have no space in which to expand and hence the can or bottle will explode. If you're freezing anything you should make sure there is space in the top of the container for it to expand.
The hot water heats the air in the system, causing it to expand.
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.
Yes, although being a liquid it will expand and break the bottle
Not necessarily. You have to have a space of air in the bottle. The expansion/contraction happens because the water is heating/cooling the air. Liquids are usually considered incompressible and hence will not change their volume when heated or cooled (unless it evaporates or melts!). Assuming that you have an air space: If you have cold water in a sealed bottle that you heat up, it will expand. If you put hot water in a bottle and seal it, it will contract as it cools. If the bottle is not sealed, there will be no volume change.
because the air has pressure so when we crush the air is expand
the metal cap will expand , and it will be easier to remove the cap from the bottle
Because the heat from the hot water is transferred through the wall of the bottle to the inside, where it heats the air, causing it to expand and come out the top of the bottle.