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 Form 1 Physics heat transfer topical questions and answers

When a Bunsen burner is lit below wire gauze, it is noted that the flame initially burns below the gauze as shown in figure 5(i). After some time, the flame burns below as well as above the gauze as shown in figure 5(ii)
Explain the observation.

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Answer Text:
- Initially the wire gauze conducts heat away so that the gas above does not attain the ignition