Is a bubble gas, liquid, or solid?
114066
Depends on the bubble.  If you are blowing bubbles in the pool, the bubbles are air.  But if you are making them with bubble solution, they are liquid on the surface, trapping the air inside.
879693
An ideal gas\n\nAn ideal gas or perfect gas is a hypothetical gas consisting of identical particles of zero volume, with no intermolecular forces. Additionally, the constituent atoms or molecules undergo perfectly elastic collisions with the walls of the container. Real gases do not exhibit these exact properties, although the approximation is often good enough to describe real gases. The approximation breaks down at high pressures and low temperatures, where the intermolecular forces play a greater role in determining the properties of the gas. There are basically three types of ideal gas:\n\n    * the classical or Maxwell-Boltzmann ideal gas,\n    * the ideal quantum Bose gas, composed of bosons, and\n    * the ideal quantum Fermi gas, composed of fermions.\n\nThe classical ideal gas can be separated into two types: The classical thermodynamic ideal gas and the ideal quantum Boltzmann gas. Both are essentially the same, except that the classical thermodyamic ideal gas is based on classical thermodynamics alone, and certain thermodynamic parameters such as the entropy are only specified to within an undetermined additive constant. The ideal quantum Boltzmann gas overcomes this limitation by taking the limit of the quantum Bose gas and quantum Fermi gas in the limit of high temperature to specify these additive constants. The behavior of a quantum Boltzmann gas is the same as that of a classical ideal gas except for the specification of these constants. The results of the quantum Boltzmann gas are used in a number of cases including the Sackur-Tetrode equation for the entropy of an ideal gas and the Saha ionization equation for a weakly ionized plasma.\n\nreal gas \n\nA gas is one of the four major phases of matter (after solid and liquid, and followed by plasma, that subsequently appear as a solid material is subjected to increasingly higher temperatures. Thus, as energy in the form of heat is added, a solid (e.g., ice) will first melt to become a liquid (e.g., water), which will then boil or evaporate to become a gas (e.g., water vapor). In some circumstances, a solid (e.g., "dry ice") can directly turn into a gas: this is called sublimation. If the gas is further heated, its atoms or molecules can become (wholly or partially) ionized, turning the gas into a plasma.
518364
liquids and gases only.\nparticles must be able to move around to form convection currents and solid particles are not free to move about.
1159475
Liquid-Gas... water evaporating.  As energy (heat) is added to water molecules, they begin to move more rapidly and break apart from each other with more ease.  They are then able to become completely separate to the point that they can float up into the atmosphere.\n\nLiquid-Solid... water freezing.  As energy (heat) is removed from water molecules, the binding together of two water molecules becomes more frequent.  At water's freezing temperature, the water molecules become binded together so that they are stuck together and don't move nearly as much (they still vibrate, though).
35150
Solid, Liquid, gas.... plasma is sometimes considered a state
648266
liquid? if u mean state of matter.
1072369
Methane Gas (CH4) is what the bubbles are.
325192
Bubbles are good examples of minimal surfaces. Meaning that they will always attain a shape which gives them the smallest surface area, given the contraints upon them. No contraints (just floatin' free) will always create spherical bubbles for this reason. If you make bubbles stick to some sort of shape, or stick bubbles together, they will create more complex shapes, including some with flat sides (imagine, for instance, two bubbles stuck together, they intersect in a flat circle). So, with the right bubbles and a lot of luck, you would be able to create some rather interesting shapes in the middle of a cluster. But free-floating non-spherical bubbles are an impossibility.
38108
It's a colloid in the form of gas in a solid.
422003
it's not that easy to define a "liquid" in a conventional way: take for example the glass for windows, it has its own volume and shape so we would define it a solid, but its microscopic disordered structure would make us call it a liquid! If we could wait ages we would see it flowing (as they say it happens for the windows in Chartres Cathedral.\nSo in material science liquid is a system that on ordinary observation time scale (years) shows a viscosity (the property of flowing  eg water is less viscous than honey) below 10^12 Pa*s
174818
Its all about shape and volume.  Solids have a set, defined shape, and a set volume.  Liquids have no defined shape, but a set volume, and gas has no set shape nor a set volume.  Those two things define whether or not something is solid, liquid, or gas.
587553
It depends on the temperature and pressure.  At standard conditions (atmospheric pressure, room temperature), it's a solid.
530314
Solids, liquids, and gases refer to the individual properties of matter.  Air pollution is a mix of liquids solids and gases depending on what the pollution is.  Smoke for instance is just micro-solid particles in the air.  Hydrogen sulfide for example would be a gas.
478525
Everyone says that The surface tension causes the bubble to be spherical. But how? and Why? \n\nLets explain surface tension first- \nIn an air-water interface, the molecules that are close to the surface are attracted by fewer molecules of the liquid than the ones that are NOT close to the surface. The former thus, has less attractive potential energy than the latter, right?\n\nNow, for any matter (solid or liquid), attractive potential energy results in stability & repulsive energy results in instablity (common sense). \n\nSo, it is energetically unfavourable to have a surface for a liquid (or solid) as it results in loss of attractive potential energy.\n\nNow, for that reason, a bubble wants to have the lowest possible surface area to remain stable. Now, using some high level mathematics, someone found out that a sphere has the lowest possible surface area for a given volume. (it is better than a cube atleast).\n\nHence why we can see that the water bubbles and drops tend to be spherical. Due to the effect of gravity, although the drops appear oval in shape but, in the absense of gravity, all the liguid-air surfaces tend to be spherical.\n\nI hope it helped.\nHave a nice day!
150532
The bubbles are steam, or water vapor.  They are NOT from hydrogen and oxygen.
620099
A bubble is a liquid with AIR inside. Liquid has SURFACE tension, which is EQUAL on all sides of the bubble, therefore it forces itself into a spherical shape.
427529
The air in the bubble is enclosed by the smallest possible surface area -- a sphere.