Foam
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Foam is a two-phase material system and a type of dispersed media, consisting of gas cells dispersed in a continuous liquid or solid phase to form a cellular structure. In most foams, the gas occupies
Top of a foamy drink
Schematic stress-strain curve of an elastomeric foam, demonstrating the three regions which are linear elastic, cell-wall buckling, and cell-wall fracture, where the area under the curve specified represents the energy per unit volume the foam can absorb.[citation needed]
Cleaning sponge
Soap foam bubbles
Beer head
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Beer head is the frothy foam on top of beer and carbonated beverages which is produced by bubbles of gas, predominantly carbon dioxide, rising to the surface. The elements that produce the head are wo
Foam
…Bath sponge – a bath sponge is an example of an open-cell foam; water easily flows through the entire structure, displacing the air. The head on a glass of beer Soap foam (also known as suds…
A glass of beer with a large head of foam
A glass of beer with the head having receded, leaving behind noticeable lacing
A German wheat beer served in the traditional glassware. The glass has a half litre fill line and is designed with extra space specifically to accommodate the head.