When the pipe metal heats up or cools down, it expands and contracts. If the ends were free, it would just get longer and shorter as it heated or cooled. However, pipes are usually connected to other pipes at their ends. Even a little bit of expansion or contraction would set up large forces on the end sections that might make them bend, and then leak. The u-shaped piece allows the pipe to expand and contract a little bit without placing enormous stress on its ends. -----|__|-------------------------------- ^^ The elbows at the top of the "u" get slightly closer together when the pipe expands, and slightly farther apart when it cools. A "U" may also serve to trap bits of particulate matter (if it's pointing downward) or gas bubbles (if it's pointing upward) but generally it's there to permit thermal expansion.
liquids have a fixed volume because their molecules are closely packed together and do not compress easily, maintaining a constant volume. However, liquids do not have a fixed shape because their molecules are free to move past one another, allowing them to flow and take the shape of their container.
A liquid (water) takes on the temperature you give it. You need to boil the water if you want to brew a cup of tea. Having brewed your cup of tea, it will take on the shape of the cup you use. Therefore, gas and liquids take on the shape of the container.
A gas changes shape when placed into a container. Gases do not have a fixed shape or volume, and they expand to fill the space available to them. This is in contrast to solids and liquids, which have a fixed shape and volume.
A solid has a definite shape because its particles are closely packed in a fixed arrangement. This fixed structure gives solids a specific shape that remains constant unless acted upon by an external force.
Shape is indefinite with liquids as they take the shape of the container they are placed in, conforming to its boundaries. Liquids do not have a fixed shape of their own.
No, liquids do not have a fixed volume - their volume is that of the container
A gas has no fixed volume or shape.
A solid has a fixed volume and does not change shape.
The phase of matter with no fixed shape but fixed volume is a liquid. Liquids take the shape of their container but maintain a constant volume because the particles are close together but can move past each other.
Sort of, Solids have a fixed shape, while liquids have no fixed shape.
Yes, of course. A stem is a solid object. So, it has a fixed shape and fixed volume.
They have no fixed shape.
solid
fixed shape
a solid
solid
Gas