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It's the part of the Bunsen burner which lets in air, adjusting the strength of the flame. basically the hole at the bottom with the twisty bit.

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12y ago
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12y ago

Something in life mwahahahaha its somthin in science!

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12y ago

it is to allow the desired amount of oxygen inside to make a blue flame. if it is closed it makes a yellow flame that less hotter

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12y ago

The purpose of the sleeve on a Bunsen Burner is to switch between the blue/transparent flame (the hot one) and the orange one.

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15y ago

hello go on stardoll and stardoll

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Q: What is the purpose of a collar on a Bunsen burner?
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