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Because the ceramic or glass disc rattles as the water boils alerting you that the water is boiling therefore you do not forget about it and it does not boil over.
Besides functioning as an audible alerter, the ceramic or glass disc will absorb excess heat in the pot. This is especially true when you are boiling something starchy such as rice or pasta. The layer of starch floats to the surface of the water and prevents the water from giving off it's excess heat. The ceramic or glass disc absorbs this extra heat and prevents the water from super-heating and boiling over.
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Can boiling water will stay at the same temperature when you lower the heat under it but keep it boiling?
Yes
Why would anyone use ceramic dishes to heat or keep water cool?
Ceramic is an excellent insulator. This is why coffee cups are made of ceramic. They keep your coffee hot for a long time. Metal cups, in contrast, conduct heat quite rapidly.
What is the meaning of rolling boiling in cooking?
It refers to a boil. When water is boiling, a rolling boil is when you are stirring the water and it is still boiling.
How did vikings keep their water fresh?
Boiling it then storing it in animal skin containers.....
Can you use cooking spray in boiling water?
Yes, but spraying it in the water before the water gets hot and boils is the best for safety. A bit of oil in the water when boiling pasta will keep it from sticking together.
How do you get salt from a salt and water solution?
keep boiling the water until all the water has evapotated...using lab equipment
How does antifreeze keep the water in your radiator from freezing and overheating?
It changes the freezing and boiling point.
What chemical is useful as a nuclear powered battery?
Plutonium oxide, baked into a ceramic form to keep it from migrating into the air or water.
Can you pour boiling liquid into melamine bowl?
No, it is not safe to pour boiling liquid into a melamine bowl as it may cause the bowl to crack or release harmful chemicals into the liquid. It is recommended to use heat-resistant glass or ceramic bowls for pouring boiling liquids.
How long will refrigerated peas keep?
In the refrigerator peas should keep for a few days. Be sure to keep them in a zip lock bag and not in a can.
Why does a boiling milk overflow but a boiling water does not?
Boiling milk contains fats and proteins that create a thicker, stickier consistency when heated, causing it to easily overflow and create a mess. On the other hand, boiling water is a simpler liquid with just water molecules, so it doesn't become as frothy or thick and is less likely to overflow.
Why does hot tap water not boiling when you pour it in a cup?
Hot tap water may not be boiling because most home water heaters keep water stored at a set temperature below boiling point to prevent scalding. Boiling point is achieved at 212°F (100°C) at sea level, and tap water is typically stored at temperatures below this to ensure safety for household use.
