As you leave a glass of water out, it warms. As it warms, various gasses (CO2, O2) become less soluble in it. Hence they escape from it in the form of these bubbles!
Take a steel glass and add chilled water in it and few ice cubes. And them simply keep it on a table. You will see after few seconds water is present on outer walls of glass. Thats because water vapour get condensed due to low tempreature.
The bubbles you see are only excess air that has been deposited on the surfaces in the tank. They are perfectly normal and will dissappear in time.
no. the water only smooths glass. glass needs to be over 1500 °C, or about 2700 °F to melt
Surface tension.
put the cold water into inner glass and hot water out the glass
Non-polar gas molecules such as nitrogen and oxygen, which make up around 98% of the air, are not very soluble in water. There are two possible reasons why a standing glass of water will form bubbles if left over time. If you pour a glass of water you mix in additional gas to it which as the water / gas mixture returns to equilibrium, starts leaving solution (imagine oil sitting on water, stirring the two, and then watching the two separate again, the air above the water surface is like the oil in this case). Also as the temperature of water rises, the gas solubility falls and so they start to form bubbles out of solution. Water out of a tap may be cooler than the room. As the water warms up gas solubility falls, the equilibrium shifts, and gas and water start to separate.
No, bubbles in soda water are carbon dioxide (introduced to the bottle when manufactured) whereas bubbles in regular water are entrapped air (introduced say by aerating over a water fall or the like - they can also occur in tap water by getting air in the pipes and then being entrapped when being pumped through the network of pipes to your house).
Surface Tension
After you spray something with a water based coating you should spray over it with polyurethane. This will make the bubbles not come up and the surface you have just sprayed stay smooth.
In that case, it will change direction twice - in this example, once when it changes over from water to glass, and once when it changes from glass to air.
Sea glass is a type of glass that is found near salt water. It is basically just broken pieces of glass that have been weathered and tumbled in salt water. The pieces then become smooth and cloudy over time.
Rapids occur in a shallower part of a river where there is a steep difference in levels. This increases how fast the water flows. Water then hits exposed rocks and creates air bubbles making the water appear white in color.