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Foam is essentially a mass of bubbles. Bubbles are pockets of air trapped by (usually) a liquid, held together by a phenomenon known as surface tension.
To create a foam, you need to start with a liquid viscous enough to hold some shape. Water alone will not do this. Try taking room-temperature egg whites and whisk them in a large bowl. Do this vigorously until you produce... (ta daa!) foam.
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What is the foam block for in the Bell Jar experiment?
The foam block is used to support the bell jar and create a seal with the baseplate. This helps to create a vacuum inside the bell jar by preventing air from entering or escaping during the experiment.
Why do bubbles appear in salt water?
The pollution in the sea (sodas) create a foam NOT bubbles
What foam is?
The most general definition of foam is a substance that is formed by trapping many gas bubbles in a liquid or solid. It can also refer to anything that is analogous to such a phenomenon, such as quantum foam. Often the term is used in reference to polyurethane foam (foam rubber), XPS foam, Styrofoam or some other manufactured foam. It can be considered a type of colloid.(Copy from Wikipedia:Foam)To create a foam, you need to start with a liquid viscous enough to hold some shape. Water alone will not do this. Try taking room-temperature egg whites and whisk them in a large bowl. Do this vigorously until you produce... (ta daa!) foam.
What media did Oldenburg use to create Floor Cone?
painted canvas filled with foam rubber and cardboard boxes
How can you create you?
Foam is essentially a mass of bubbles. Bubbles are pockets of air trapped by (usually) a liquid, held together by a phenomenon known as surface tension. To create a foam, you need to start with a liquid viscous enough to hold some shape. Water alone will not do this. Try taking room-temperature egg whites and whisk them in a large bowl. Do this vigorously until you produce... (ta daa!) foam.
Can i use high impact polystyrene for lost foam casting?
No. High impact polystyrene is a very hard plastic. If you tried doing a lost-foam casting you'd just make a mess.You make a lost-foam casting by creating a styrofoam model of your finished piece, packing casting sand around it to create a mold, then pouring metal into the mold. When the hot metal touches the foam, it vaporizes.You could make your model out of high impact polystyrene then use that to create a cope and drag mold.
What is foam resistance?
Foam resistance is a term that is commonly used in companies that create injection molds and fire resistant equipment. This term means that a product is able to resist damage or corrosion when it is in direct contact with chemicals or solvents.
What part of speech is foam?
Foam is a noun (the foam) and a verb (to foam).
What are the top three tips for creating inviting floral designs?
Use your floral foam effectively be creative with it. Mix your colours create interesting shades. Always soak your floral foam in water to help you arrangement last longer.
How is aqueous film foam created for firefighting use?
Aqueous film foam (AFFF) is created by mixing water, fluorochemical surfactants, and stabilizers. The mixture is then aerated to produce a foam that can be used to suppress fires. When applied to a fire, the foam creates a blanket that separates the oxygen from the fuel source, effectively smothering the fire and preventing re-ignition.
Which is the gas that helps to make foam that firefighters use?
Air is the gas most commonly used to create the foam that firefighters use. Most commonly, the foam is generated by adding a small amount (1%-5%) of foaming agent into the water flow coming from the fire engine. This is done by either injecting it into the water stream with a small metering pump, or with a foam eductor which draws the foam into the water stream using a venturi. A foam play pipe, or Foam nozzle is used on the end of the water line which is designed to draw air into the stream of water, and creates the foam. More recently air compressors (CAFS - Compressed Air Foam System) are being added to some newer fire apparatus which injects air directly into the water stream. This allows for even less water to be used in firefighting, and produces a more consistant foam.
Is foam core the same as foam board?
Yes. Foam board and foam core are the same thing.
