A phase transition is the change of a substance from one state of matter to another.
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What happens in a liquid during evaporation and boiling? What does its boiling point depend on?
The vacuum cleaner creates a partial vacuum and sucks up dust with the help of the incoming high-pressure air.
During freezing hydrogen bonds are formed between water molecules resulting in a crystal structure.
The relationship between the pressure, volume and temperature of ideal gases is described by the gas laws.
Surface tension is the property of a liquid that allows it to obtain the smallest surface area possible.
Candles have been used for lighting since ancient times.
There are various types of instruments used for measuring temperature.
Water is a very stable compound of hydrogen and oxygen, vital for all known forms of life. In nature it occurs in liquid, solid and gaseous state.
An air conditioner cools the air inside by drawing heat away and releasing it outside.
This animation demonstrates the structure and operation of hair dryers.
This animation demonstrates how a refrigerator works.