Liquids in the context of "Intermolecular bonds"

A hydrometer or lactometer is an instrument used for measuring density or relative density of liquids based on the concept of buoyancy. They are typically calibrated and graduated with one or more scales such as specific gravity.

A hydrometer usually consists of a sealed hollow glass tube with a wider bottom portion for buoyancy, a ballast such as lead or mercury for stability, and a narrow stem with graduations for measuring. The liquid to test is poured into a tall container, often a graduated cylinder, and the hydrometer is gently lowered into the liquid until it floats freely. The point at which the surface of the liquid touches the stem of the hydrometer correlates to relative density. Hydrometers can contain any number of scales along the stem corresponding to properties correlating to the density.

A tanker (or tank ship or tankship) is a ship designed to transport or store liquids or gases in bulk. Major types of tanker ship include the oil tanker (or petroleum tanker), the chemical tanker, cargo ships, and a gas carrier. Tankers also carry commodities such as vegetable oils, molasses and wine.

In the United States Navy and Military Sealift Command, a tanker used to refuel other ships is called an oiler (or replenishment oiler if it can also supply dry stores) but many other navies use the terms tanker and replenishment tanker.

A cup is a small container used to hold liquids for drinking, typically with a flattened hemispherical shape and an open "mouth", and often with a capacity of about 6–16 US fluid ounces (177–473 ml). Cups may be made of pottery (including porcelain), glass, metal, wood, stone, polystyrene, plastic, lacquerware, or other materials. Normally, a cup is brought in contact with the mouth for drinking, distinguishing it from other tableware and drinkware forms such as jugs; however, a straw and/or lid may also be used. They also often have handles, though many do not, including beakers which have no handle or stem, or small bowl shapes which are very common in Asia.

There are many specific terms for different types of cups in different cultures, many depending on the type of drink they are mostly used for, and the material they are made of; in particular, cups made of glass are mostly called a "glass" in contemporary English. Cups of different styles may be used for different types of liquids or other foodstuffs (e.g, teacups and measuring cups), in different situations (e.g, at water stations or in ceremonies and rituals), or for decoration.

Crystallinity refers to the degree of structural order in a solid. In a crystal, the atoms or molecules are arranged in a regular, periodic manner. The degree of crystallinity has a large influence on hardness, density, transparency and diffusion. In an ideal gas, the relative positions of the atoms or molecules are completely random. Amorphous materials, such as liquids and glasses, represent an intermediate case, having order over short distances (a few atomic or molecular spacings) but not over longer distances.

Many materials, such as glass-ceramics and some polymers, can be prepared in such a way as to produce a mixture of crystalline and amorphous regions. In such cases, crystallinity is usually specified as a percentage of the volume of the material that is crystalline. Even within materials that are completely crystalline, however, the degree of structural perfection can vary.